To teach young people or old people how to observe nature is a good deal like trying to teach them how to eat their dinner. The first thing necessary in the latter case is a good appetite; this given, the rest follows very easily. And in observing nature, unless you have the appetite, the love, the spontaneous desire, you will get little satisfaction. It is the heart that sees more than the mind. To love Nature is the first step in observing her. If a boy had to learn fishing as a task, what slow progress he would make; but as his heart is in it, how soon he becomes an adept.

The eye sees quickly and easily those things in which we are interested. A man interested in horses sees every fine horse in the country he passes through; the dairyman notes the cattle; the bee culturist counts the skips of bees; the sheep-grower notes the flocks, etc. Is it any effort for the ladies to note the new bonnets and the new cloaks upon the street? We all see and observe easily in the line of our business, our tasks, our desires.

If one is a lover of the birds, he sees birds everywhere, plenty of them. I think I seldom miss a bird in my walk if he is within eye or ear shot, even though my mind be not intent upon that subject. Walking along the road this very day, feeling a cold, driving snow-storm, I saw some large birds in the top of a maple as I passed by. I do not know how I came to see them, for I was not in an ornithological frame of mind. But I did. There were three of them feeding upon the buds of the maple. They were nearly as large as robins, of a dark ash-color, very plump, with tails much forked. What were they? My neighbor did not know; had never seen such birds before. I instantly knew them to be pine grosbeaks from the far north. I had not seen them before for ten years. A few days previously I had heard one call from the air as it passed over; I recognized the note, and hence knew that the birds were about. They come down from the north at irregular intervals, and are seen in flocks in various parts of the States. They seem just as likely to come mild winters as severe ones. Later in the day the birds came about my study. I sat reading with my back to the window when I was advised of their presence by catching a glimpse of one reflected in my eye-glasses as it flew up from the ground to the branch of an apple-tree only a few feet away. I only mention the circumstance to show how quick an observer is to take the hint. I was absorbed in my reading, but the moment that little shadow flitted athwart that luminous reflection of the window in the corner of my glasses, something said "that was a bird." Approaching the window, I saw several of them sitting not five feet away. I could inspect them perfectly. They were a slate-color, with a tinge of bronze upon the head and rump. In full plumage the old males are a dusky red. Hence these were all either young males or females. Occasionally among these flocks an old male may be seen. It would seem as if only a very few of the older and wiser birds accompanied these younger birds in their excursions into more southern climes.

Presently the birds left the apple-bough that nearly brushed my window, and, with a dozen or more of their fellows that I had not seen, settled in a Norway spruce a few yards away, and began to feed upon the buds. They looked very pretty there amid the driving snow. I was flattered that these visitants from the far north should find entertainment on my premises. How plump, contented, and entirely at home they looked. But they made such havoc with the spruce buds that after a while I began to fear not a bud would be left upon the trees; the spruces would be checked in their growth the next year. So I presently went out to remonstrate with them and ask them to move on. I approached them very slowly, and when beside the tree within a few feet of several of them, they heeded me not. One bird kept its position and went on snipping off the buds till I raised my hand ready to seize it, before it moved a yard or two higher up. I think it was only my white, uncovered hand that disturbed it. Indeed,

The snow was covered with the yellow chaffy scales of the buds and still the birds sifted them down, till I was compelled to "shoo" them away, when they moved to a tree nearer the house beneath which they left more yellow chaff upon the snow.

The mind of an observer is like a gun with a hair trigger—it goes at a touch, while the minds of most persons require very vigorous nudging. You must take the hint and take it quickly if you would get up any profitable intimacy with nature. Above all, don't jump to conclusions; look again and again; verify your observations. Be sure the crow is pulling corn, and not probing for grubs, before you kill him. Be sure it is the oriole purloining your grapes, and not the sparrows, before you declare him your enemy. I one day saw hummingbirds apparently probing the ripe yellow cheeks of my finest peaches, but I was not certain till I saw a bird hovering over a particular peach, and then mounting upon a ladder I examined it, when sure enough, the golden cheek was full of pin-holes. The orioles destroy many of my earliest pears, but it required much watching to catch them in the very act. I once saw a phoebe-bird swoop down upon a raspberry bush and carry a berry to a rail on a near fence, but I did not therefore jump to the conclusion that the phoebe was a berry-eater. What it wanted was the worm in the berry. How do I know? Because I saw it extract something from the berry and fly away.

A French missionary, said to have been a good naturalist, writing in this country in 1634, makes this curious statement about our hummingbird: "This bird, as one might say, dies, or, to speak more correctly, puts itself to sleep in the month of October, living fastened to some little branchlet of a tree by the feet, and wakes up in the month of April when the flowers are in abundance, and sometimes later, and for that cause is called in the Mexican tongue the 'Revived.'" How could the good missionary ever have been led to make such a statement? The actual finding of the bird wintering in that way would have been the proof science demands, and nothing short of that.

A boy in the interior of the State wrote to me the other day that while in the field looking after Indian arrow-heads he had seen a brown and gray bird with a black mark running through the eye, and that the bird walked instead of hopped. He said it had a high, shrill whistle and flew like a meadowlark. This boy is a natural observer; he noted that the bird was a walker. Most of the birds hop or jump, keeping both feet together. This boy heard his bird afterward in the edge of the evening, and "followed it quite a ways, but could not get a glimpse of it." He had failed to note the crest on its head and the black spot on its breast, for doubtless his strange bird was the shore lark, a northern bird, that comes to us in flocks in the late fall or early winter, and in recent years has become a permanent resident of certain parts of New York State. I have heard it in full song above the hills in Delaware County, after the manner of the English skylark, but its song was a crude, feeble, broken affair compared with that of the skylark. These birds thrive well in confinement. I had one seven months in a cage while living in Washington. It was disabled in the wing by a gunner, who brought it to me. Its wound soon healed; it took food readily; it soon became tame, and was an object of much interest and amusement. The cage in which I had hastily put it was formerly a case filled with stuffed birds. Its front was glass. As it was left out upon the porch over night, a strange cat discovered the bird through this glass, and through the glass she plunged and captured the bird. In the morning there was the large hole in this glass, and the pretty lark was gone. I have always indulged a faint hope that the glass was such a surprise to the cat, and made such a racket about her eyes and ears as she sprang against it, that she beat a hasty retreat, and that the bird escaped through the break.

II

In May two boys in town wrote to me to explain to them the meaning of the egg-shells, mostly those of robins, that were to be seen lying about on the ground here and there. I supposed every boy knew where most of these egg-shells came from. As soon as the young birds are out, the mother bird removes the fragments of shells from the nest, carrying them in her beak some distance, and dropping them here and there. All our song-birds, so far as I know, do this.

Sometimes, however, these shells are dropped by blue jays after their contents have been swallowed. The jay will seize a robin's egg by thrusting his beak into it, and hurry off lest he be caught in the act by the owner. At a safe distance he will devour the contents at his leisure, and drop the shell.

The robins, however, have more than once caught the jay in the act. He has the reputation among them of being a sneak thief. Many and many a time during the nesting season you may see a lot of robins mob a jay. The jay comes slyly prowling through the trees, looking for his favorite morsel, when he is discovered by a vigilant robin, who instantly rushes at him crying, "Thief! thief!" at the top of his voice. All the robins that have nests within hearing gather to the spot and join in the pursuit of the jay, screaming and scolding.

The jay is hustled out of the tree in a hurry, and goes sneaking away with the robins at his heels. He is usually silent, like other thieves, but sometimes the birds make it so hot for him that he screams in anger and disgust.

Of the smaller birds, like the vireos and warblers, the jay will devour the young. My little boy one day saw a jay sitting beside a nest in a tree, probably that of the red-eyed vireo, and coolly swallowing the just hatched young, while the parent birds were powerless to prevent him. They flew at him and snapped their beaks in his face, but he heeded them not. A robin would have knocked him off his feet at her first dive.

One is sometimes puzzled by seeing a punctured egg lying upon the ground. One day I came near stepping upon one that was lying in the path that leads to the spring—a fresh egg with a little hole in it carefully placed upon the gravel. I suspected it to be the work of the cowbird, and a few days later I had convincing proof that the cowbird is up to this sort of thing. I was sitting in my summer house with a book, when I had a glimpse of a bird darting quickly down from the branches of the maple just above me toward the vineyard, with something in its beak. Following up my first glance with more deliberate scrutiny, I saw a female cowbird alight upon the ground and carefully deposit some small object there, and then, moving a few inches away, remain quite motionless. Without taking my eyes from the spot, I walked straight down there. The bird flew away, and I found the object she had dropped to be a little speckled bird's egg still warm. I saw that it was the egg of the red-eyed vireo. It was punctured with two holes where the bird had seized it; otherwise it had been very carefully handled. For some days I had been convinced that a pair of vireos had a nest in my maple, but much scrutiny had failed to reveal it to me.

Only a few moments before the cowbird appeared I had seen the happy pair leave the tree together, flying to a clump of trees lower down the slope of the hill. The female had evidently just deposited her egg, the cowbird had probably been watching near by, and had seized it the moment the nest was vacated. Her plan was of course to deposit one of her own in its place.

I now made a more thorough search for the nest, and soon found it, but it was beyond my reach on an outer branch, and whether or not the cowbird dropped one of her own eggs in place of the one she had removed I do not know. Certain am I that the vireos soon abandoned the nest, though they do not always do this when hoodwinked in this way.

I once met a gentleman on the train who told me about a brood of quails that had hatched out under his observation. He was convinced that the mother quail had broken the shells for the young birds. He sent me one of the shells to convince me that it had been broken from the outside. At first glance it did appear so. It had been cut around near the large end, with the exception of a small space, as if by regular thrusts or taps from a bird's beak, so that this end opened like the lid of a box on a hinge, and let the imprisoned bird escape. What convinced the gentleman that the force had been applied from the outside was that the edges of the cut or break were bent in.

If we wish rightly to interpret nature, to get at the exact truth of her ways and doings, we must cultivate what is called the critical habit of mind; that is, the habit of mind that does not rest with mere appearances. One must sift the evidence, must cross-question the facts. This gentleman was a lawyer, but he laid aside the cunning of his craft in dealing with this question of these egg-shells.

The bending in, or the indented appearance of the edge of the shells was owing to the fact that the thin paper-like skin that lines the interior of the shell had dried and shrunken, and had thus drawn the edges of the shell inward. The cut was made by the beak of the young bird, probably by turning its head from right to left; one little point it could not reach, and this formed the hinge of the lid I have spoken of. Is it at all probable that if the mother bird had done this work she would have left this hinge, and left it upon every egg, since the hinge was of no use? The complete removal of the cap would have been just as well.

Neither is it true that the parent bird shoves its young from the nest when they are ready to fly, unless it be in the case of doves and pigeons. Our small birds certainly do not do this. The young birds will launch out of their own motion as soon as their wings will sustain them, and sometimes before. There is usually one of the brood a little more forward than its mates, and this one is the first to venture forth. In the case of the bluebird, chickadee, high-hole, nuthatch, and others, the young are usually a day or two in leaving the nest.

The past season I was much interested in seeing a brood of chickadees, reared on my premises, venture upon their first flight. Their heads had been seen at the door of their dwelling—a cavity in the limb of a pear-tree—at intervals for two or three days. Evidently they liked the looks of the great outside world; and one evening, just before sundown, one of them came forth. His first flight was of several yards to a locust, where he alighted upon an inner branch, and after some chirping and calling proceeded to arrange his plumage and compose himself for the night. I watched him till it was nearly dark. He did not appear at all afraid there alone in the tree, but put his head under his wing and settled down for the night as if it were just what he had always been doing. There was a heavy shower a few hours later, but in the morning he was there upon his perch in good spirits.

I happened to be passing in the morning when another one came out. He hopped out upon a limb, shook himself, and chirped and called loudly. After some moments an idea seemed to strike him. His attitude changed, his form straightened up, and a thrill of excitement seemed to run through him. I knew what it all meant; something had whispered to the bird, "Fly!" With a spring and a cry he was in the air, and made good headway to a near hemlock. Others left in a similar manner during that day and the next, till all were out.

Some birds seem to scatter as soon as they are out of the nest. With others the family keeps together the greater part of the season. Among birds that have this latter trait may be named the chickadee, the bluebird, the blue jay, the nuthatch, the kingbird, the phoebe-bird, and others of the true flycatchers.

One frequently sees the young of the phoebe sitting in a row upon a limb, while the parents feed them in regular order. Twice I have come upon a brood of young but fully fledged screech owls in a dense hemlock wood, sitting close together upon a low branch. They stood there like a row of mummies, the yellow curtains of their eyes drawn together to a mere crack, till they saw themselves discovered. Then they all changed their attitudes as if an electric current had passed through the branch upon which they sat. Leaning this way and that, they stared at me like frightened cats till the mother took flight, when the young followed.

The family of chickadees above referred to kept in the trees about my place for two or three weeks. They hunted the same feeding-ground over and over, and always seemed to find an abundance. The parent birds did the hunting, the young did the calling and the eating. At any hour in the day you could find the troop slowly making their way over some part of their territory.

Later in the season one of the parent birds seemed smitten with some fatal malady. If birds have leprosy, this must have been leprosy. The poor thing dropped down through a maple-tree close by the house, barely able to flit a few feet at a time. Its plumage appeared greasy and filthy, and its strength was about gone. I placed it in the branches of a spruce-tree, and never saw it afterward.

III

A boy brought me a dead bird the other morning which his father had picked up on the railroad. It had probably been killed by striking the telegraph wires. As it was a bird the like of which he had never seen before, he wanted to know its name. It was a wee bird, mottled gray and brown like nearly all our ground birds, as the sparrows, the meadowlark, the quail: a color that makes the bird practically invisible to its enemies in the air above. Unlike the common sparrows, its little round wings were edged with yellow, with a tinge of yellow on its shoulders; hence its name, the yellow-winged sparrow. It has also a yellowish line over the eye. It is by no means a common bird, though there are probably few farms in the Middle and Eastern States upon which one could not be found. It is one of the birds to be looked for. Ordinary observers do not see it or hear it.

It is small, shy, in every way inconspicuous. Its song is more like that of an insect than that of any other of our birds. If you hear in the fields in May and June a fine, stridulous song like that of a big grasshopper, it probably proceeds from this bird. Move in the direction of it and you will see the little brown bird flit a few yards before you. For several mornings lately I have heard and seen one on a dry, gravelly hillock in a field. Each time he has been near the path where I walk. Unless your ear is on the alert you will miss his song. Amid the other bird songs of May heard afield it is like a tiny, obscure plant amid tall, rank growths. The bird affords a capital subject for the country boy, or town boy, either, when he goes to the country, to exercise his powers of observation upon. If he finds this bird he will find a good many other interesting things. He may find the savanna sparrow also, which closely resembles the bird he is looking for. It is a trifle larger, has more bay about the wings, and is more common toward the coast. Its yellow markings are nearly the same. There is also a variety of the yellow-winged sparrow called Henslow's yellow-winged sparrow, but it bears so close a resemblance to the first-named that it requires a professional ornithologist to distinguish them. I confess I have never identified it.

I never see the yellow-wing without being reminded of a miniature meadowlark. Its short tail, its round wings, its long and strong legs and feet, its short beak, its mottled coat, the touch of yellow, as if he had just rubbed against a newly-opened dandelion, but in this case on the wings instead of on the breast, the quality of its voice, and its general shape and habits, all suggest a tiny edition of this large emphatic walker of our meadows.

The song of this little sparrow is like the words "chick, chick-a-su-su," uttered with a peculiar buzzing sound. Its nest is placed upon the ground in the open field, with four or five speckled eggs. The eggs are rounder and their ground color whiter than the eggs of other sparrows.

I do not know whether this kind walks or hops. This would be an interesting point for the young observer to determine. All the other sparrows known to me are hoppers, but from the unusually long and strong legs of this species, its short tail and erect manner, I more than half suspect it is a walker. If so, this adds another meadowlark feature.

Let the young observer follow up and identify any one bird, and he will be surprised to find how his love and enthusiasm for birds will kindle. He will not stop with the one bird. Carlyle wrote in a letter to his brother, "Attempt to explain what you do know, and you already know something more." Bring what powers of observation you already have to bear upon animate nature, and already your powers are increased. You can double your capital and more in a single season.

The first among the less common birds which I identified when I began the study of ornithology was the red-eyed vireo, the little gray bird with a line over its eye that moves about with its incessant cheerful warble all day, rain or shine, among the trees, and it so fired my enthusiasm that before the end of the season I had added a dozen or more (to me) new birds to my list. After a while the eye and ear become so sensitive and alert that they seem to see and hear of themselves, and like sleepless sentinels report to you whatever comes within their range. Driving briskly along the road the other day, I saw a phoebe-bird building her nest under a cliff of rocks. I had but a glimpse, probably two seconds, through an opening in the trees, but it was long enough for my eye to take in the whole situation: the gray wall of rock, the flitting form of the bird and the half-finished nest into which the builder settled. Yesterday, May 7, I went out for an hour's walk looking for birds' nests. I made a tour of some orchards, pastures, and meadows, but found nothing, and then came home and found a blue jay's nest by my very door. How did I find it? In the first place my mind was intent upon nest finding: I was ripe for a bird's nest. In the second place I had for some time suspected that a pair of jays were nesting or intending to nest in some of the evergreens about my house; a pair had been quite familiar about the premises for some weeks, and I had seen the male feed the female, always a sure sign that the birds are mated, and are building or ready to build. Many birds do this. I have even seen the crow feed its mate in April. Just at this writing, a pair of chickadees attracted my attention in a spruce-tree in front of my window. One of them, of course the male, is industriously feeding the other. The female hops about, imitating the voice and manner of a young bird, her wings quivering, her cry plaintive, while the male is very busy collecting some sort of fine food out of the just bursting buds of the tree. Every half minute or so he approaches her and delivers his morsel into her beak. I should know from this fact alone that the birds have a nest near by. The truth is, it is just on the other side of the study in a small cavity in a limb of a pear-tree. The female is laying her eggs, one each day, probably, and the male is making life as easy for her as possible, by collecting all her food for her.

Hence, when as I came down the drive and a blue jay alighted in a maple near me, I paused to observe him. He wiped his beak on a limb, changed his position a couple of times, then uttered a low mellow note. The voice as of a young jay, tender and appealing, came out of a Norway spruce near by. The cry was continued, when the bird I was watching flew in amid the top branches, and the cry became still more urgent and plaintive. I stepped along a few paces and saw the birds, the female standing up in her nest and the male feeding her. The nest was placed in a sort of basket formed by the whorl of up-curving branches at the top of the tree, the central shaft being gone.

It contained four eggs of a dirty brownish greenish color. As I was climbing up to it, a turtle dove threw herself out of the tree and fluttered to the ground as if mortally wounded. My little boy was looking on, and seeing the dove apparently so helpless and in such distress, ran to see "what in the world ailed it." It fluttered along before him for a few yards, and then its mate appearing upon the scene, the two flew away, much to the surprise of the boy. We soon found the doves' nest, a shelf of twigs on a branch about midway of the tree. It held two young birds nearly fledged. How they seemed to pant as they crouched there, a shapeless mass of down and feathers, regarding us! The doves had been so sly about their nesting that I had never suspected them for a moment. The next tree held a robin's nest, and the nest of a purple finch is probably near by. One usually makes a mistake in going away from home to look for birds' nests. Search the trees about your door.

The blue jay is a cruel nest-robber, but this pair had spared the doves in the same tree, and I think they have made their peace with the robins, as I do not see the latter hustling them about any more. Probably they want to stand well with their neighbors, and so go away from home to commit their robberies.

IV

If a new bird appears in my neighborhood, my eye or ear reports it at once. One April several of those rare thrushes—Bicknell's or Slide Mountain thrush—stopped for two days in my currant-patch. How did I know? I heard their song as I went about the place, a fine elusive strain unlike that of any other thrush. To locate it exactly I found very difficult. It always seemed to be much farther off than it actually was. There is a hush and privacy about its song that makes it unique. It has a mild, fluty quality, very sweet, but in a subdued key. It is a bird of remote northern mountain-tops, and its song seems adjusted to the low, thick growths of such localities.

The past season a solitary great Carolina wren took up its abode in a bushy land near one corner of my vineyard. It came late in the season, near the end of August, the only one I had ever heard north of the District of Columbia. During my Washington days, many years ago, this bird was one of the most notable songsters observed in my walks. His loud, rolling whistle and warble, his jocund calls and salutations—how closely they were blended with all my associations with nature on the Potomac. When, therefore, one morning my ear caught the same blithe, ringing voice on the Hudson, be assured I was quickly on the alert. How it brought up the past. How it reopened a chapter of my life that had long been closed. It stood out amid other bird songs and calls with a distinctness that attracted the dullest ears. Such a southern, Virginia air as it gave to that nook by the river's side!

I left my work amid the grapes and went down to interview the bird. He peeped at me inquisitively and suspiciously for a few moments from a little clump of weeds and bushes, then came out in fuller view, and finally hopped to the top of a grape-post, drooped his wings and tail, lifted up his head, and sang and warbled his best. If he had known exactly what I came for and had been intent upon doing his best to please me, he could not have succeeded better.

The great Carolina wren is a performer like the mockingbird, and is sometimes called the mocking wren. He sings and acts as well. He seems bent on attracting the attention of somebody or something. A Southern poet has felicitously interpreted certain notes by the words, "Sweetheart, sweetheart, sweet."

Day after day and week after week, till the frosts of the late October came, the bird tarried in that spot, confining his wanderings to a very small area and calling and warbling at all hours. From my summer-house I could often hear his voice rise up from under the hill, seeming to fill all the space down there with sound. What brought this solitary bird there, so far from the haunts of his kind, I know not. Maybe he was simply spying out the land, and will next season return with his mate. Mockingbirds have wandered north as far as Connecticut, and were found breeding there by a collector, who robbed them of their eggs. The mocking wren would be a great acquisition to our northern river banks and bushy streams. It is the largest of our wrens, and in the volume and variety of its notes and the length of its song season surpasses all others.

A lover of nature never takes a walk without perceiving something new and interesting. All life in the winter woods or fields as revealed upon the snow, how interesting it is. I recently met a business man who regularly goes camping to the Maine woods every winter from the delight he has in various signs of wild life written upon the snow. His morning paper, he says, is the sheet of snow which he reads in his walk. Every event is chronicled, every new arrival registers his name, if you have eyes to read it!

In December my little boy and I took our skates and went a mile distant from home into the woods to a series of long, still pools in a wild, rocky stream for an hour's skating. There was a light skim of snow upon the ice, but not enough to interfere seriously with our sport, while it was ample to reveal the course of every wild creature that had passed the night before. Here a fox had crossed, there a rabbit or a squirrel or a muskrat.

Presently we saw a different track and a strange one. The creature that made it had come out of a hole in the ground about a yard from the edge of the long, narrow pool upon which we were skating, and had gone up the stream, leaving a track upon the snow as large as that of an ordinary-sized dog, but of an entirely different character.

We had struck the track of an otter, a rare animal in the Hudson River Valley; in fact, rare in any part of the State. We followed it with deep interest; it threw over the familiar stream the air of some remote pool or current in the depths of the Adirondacks or the Maine woods. Every few rods the otter had apparently dropped upon his belly and drawn himself along a few feet by his fore paws, leaving a track as if a log or bag of meal had been drawn along there. He did this about every three rods.

At the head of the pool where the creek was open and the water came brawling down over rocks and stones, the track ended on the edge of the ice; the otter had taken to the water. A cold bath, one would say, in mid-December, but probably no colder to him than the air, as his coat is perfectly waterproof.

On another pool farther up the track reappeared, and was rubbed out here and there by the same heavy dragging in the snow, like a chain with a long solid bar at regular distances in place of links. At one point the otter had gone ashore and scratched a little upon the ground. He had gone from pool to pool, taking the open rapids wherever they appeared.

The otter is a large mink or weasel, three feet or more long and very savage. It feeds upon fish, which it seems to capture with ease. It is said that it will track them through the water as a hound tracks a fox on land. It will travel a long distance under the ice, on a single breath of air. Every now and then it will exhale this air, which will form a large bubble next the ice, where in a few moments it becomes purified and ready to be taken into the creature's lungs again. If by any accident the bubble were to be broken up and scattered, the otter might drown before he could collect it together again. A man who lived near the creek said the presence of the otter accounted for the scarcity of the fish there.

V

The other day one of my farmer neighbors asked me if I had seen the new bird that was about. This man was an old hunter, and had a sharp eye for all kinds of game, but he had never before seen the bird, which was nearly as large as a robin, of a dull blue or slate color marked with white.

Another neighbor, who was standing by, said the bird had appeared at his house the day before. A cage with two canaries was hanging against the window, when suddenly a large bird swooped down as if to dash himself against it; but arresting himself when near the glass, he hovered a moment, eying the birds, and then flew to a near tree.

The poor canaries were so frightened that they fell from their perches and lay panting upon the floor of their cage.

No one had ever seen the bird before; what was it? It was the shrike, who thought he was sure of a dinner when he saw those canaries.

If you see, in late autumn or winter, a slim, ashen-gray bird, in size a little less than the robin, having white markings, flying heavily from point to point, and always alighting on the topmost branch of a tree, you may know it is the shrike.

He is very nearly the size and color of the mockingbird, but with flight and manners entirely different. There is some music in his soul, though his murderous beak nearly spoils it in giving it forth.

One winter morning, just at sunrise, as I was walking along the streets of a city, I heard the shrike's harsh warble. Looking about me, I soon saw the bird perched upon the topmost twig of a near tree, saluting the sunrise. It was what the robin might have done, but the strain had none of the robin's melody.

Some have compared the shrike's song to the creaking of a rusty gate-hinge, but it is not quite so bad as that. Still it is unmistakably the voice of a savage. None of the birds of prey have musical voices.

The shrike had probably come to town to try his luck with English sparrows. I do not know that he caught any, but in a neighboring city I heard of a shrike that made great havoc with the sparrows.

VI

When Nature made the flying squirrel she seems to have whispered a hint or promise of the same gift to the red squirrel. At least there is a distinct suggestion of the same power in the latter. When hard pressed the red squirrel will trust himself to the air with the same faith that the flying squirrel does, but, it must be admitted, with only a fraction of the success of the latter. He makes himself into a rude sort of parachute, which breaks the force of his fall very much. The other day my dog ran one up the side of the house, through the woodbine, upon the roof. As I opened fire upon him with handfuls of gravel, to give him to understand he was not welcome there, he boldly launched out into the air and came down upon the gravel walk, thirty feet below, with surprising lightness and apparently without the least shock or injury, and was off in an instant beyond the reach of the dog. On another occasion I saw one leap from the top of a hickory-tree and fall through the air at least forty feet and alight without injury. During their descent upon such occasions their legs are widely extended, their bodies are broadened and flattened, the tail stiffened and slightly curved, and a curious tremulous motion runs through all. It is very obvious that a deliberate attempt is made to present the broadest surface possible to the air, and I think a red squirrel might leap from almost any height to the ground without serious injury. Our flying squirrel is in no proper sense a flyer. On the ground he is more helpless than a chipmunk, because less agile. He can only sail or slide down a steep incline from the top of one tree to the foot of another. The flying squirrel is active only at night; hence its large, soft eyes, its soft fur, and its gentle, shrinking ways. It is the gentlest and most harmless of our rodents. A pair of them for two or three successive years had their nest behind the blinds of an upper window of a large, unoccupied country house near me. You could stand in the room inside and observe the happy family through the window pane against which their nest pressed. There on the window sill lay a pile of large, shining chestnuts, which they were evidently holding against a time of scarcity, as the pile did not diminish while I observed them. The nest was composed of cotton and wool which they filched from a bed in one of the chambers, and it was always a mystery how they got into the room to obtain it. There seemed to be no other avenue but the chimney flue.

There are always gradations in nature, or in natural life; no very abrupt departures. If you find any marked trait or gift in a species you will find hints and suggestions of it, or, as it were, preliminary studies of it, in other allied species. I am not thinking of the law of evolution which binds together the animal life of the globe, but of a kind of overflow in nature which carries any marked endowment or characteristic of a species in lessened force or completion to other surrounding species. Or if looked at from the other way, a progressive series, the idea being more and more fully carried out in each succeeding type—a kind of lateral and secondary evolution. Thus there are progressive series among our song-birds. The brown thrasher is an advance upon the catbird, and the mockingbird is an advance upon the brown thrasher in the same direction. Each one carries the special gift of song or mimicking some stages forward. The same among the larks, through the so-called meadowlark and the shore lark, up to the crowning triumph of the skylark. The nightingale also finishes a series which starts with the hedge warbler and includes the robin redbreast. Our ground-sparrow songs probably reach their highest perfection in the song of the fox sparrow; our finches in that of the purple finch, etc.

The same thing may be observed in other fields. The idea of the flying fish, the fish that leaves the water and takes for a moment to the air, does not seem to have exhausted itself till we reach the walking fish of tropical America, or the tree-climbing fish of India. From the protective coloring of certain insects, animals, and birds, the step is not far to actual mimicry of certain special forms and colors. The naturalists find in Java a spider that exactly copies upon a leaf the form and colors of bird droppings. How many studies of honey-gathering bees did nature make before she achieved her masterpiece in this line in the honey-bee of our hives? The skunk's peculiar weapon of defense is suggested by the mink and the weasel. Is not the beaver the head of the series of gnawers, the loon of divers, the condor of soarers? Always one species that goes beyond any other. Look over a collection of African animals and see how high shouldered they are, how many hints or prophecies of the giraffe there are before the giraffe is reached. After nature had made the common turtle, of course she would not stop till she had made the box tortoise. In him the idea is fully realized. On the body of the porcupine the quills are detached and stuck into the flesh of its enemy on being touched; but nature has not stopped here. With the tail the animal strikes its quills into its assailant. Now if some animal could be found that actually threw its quills, at a distance of several feet, the idea would be still further carried out.

The rattlesnake is not the only rattler. I have seen the black snake and the harmless little garter snake vibrate their tails when disturbed in precisely the same manner. The black snake's tail was in contact with a dry leaf, and it gave forth a loud humming sound which at once put me on the alert.

I met a little mouse in my travels the other day that interested me. He was on his travels also, and we met in the middle of a mountain lake. I was casting my fly there when I saw just sketched or etched upon the glassy surface a delicate V-shaped figure, the point of which reached about the middle of the lake, while the two sides as they diverged faded out toward the shore. I saw the point of this V was being slowly pushed toward the opposite shore. I drew near in my boat, and beheld a little mouse swimming vigorously for the opposite shore. His little legs appeared like swiftly revolving wheels beneath him. As I came near he dived under the water to escape me, but came up again like a cork and just as quickly. It was laughable to see him repeatedly duck beneath the surface and pop back again in a twinkling. He could not keep under water more than a second or two. Presently I reached him my oar, when he ran up it and into the palm of my hand, where he sat for some time and arranged his fur and warmed himself. He did not show the slightest fear. It was probably the first time he had ever shaken hands with a human being. He was what we call a meadow mouse, but he had doubtless lived all his life in the woods, and was strangely unsophisticated. How his little round eyes did shine, and how he sniffed me to find out if I was more dangerous than I appeared to his sight.

After a while I put him down in the bottom of the boat and resumed my fishing. But it was not long before he became very restless and evidently wanted to go about his business. He would climb up to the edge of the boat and peer down into the water. Finally he could brook the delay no longer and plunged boldly overboard, but he had either changed his mind or lost his reckoning, for he started back in the direction he had come, and the last I saw of him he was a mere speck vanishing in the shadows near the other shore.

Later on I saw another mouse while we were at work in the fields that interested me also. This one was our native white-footed mouse. We disturbed the mother with her young in her nest, and she rushed out with her little ones clinging to her teats. A curious spectacle she presented as she rushed along, as if slit and torn into rags. Her pace was so precipitate that two of the young could not keep their hold and were left in the weeds. We remained quiet and presently the mother came back looking for them. When she had found one she seized it as a cat seizes her kitten and made off with it. In a moment or two she came back and found the other one and carried it away. I was curious to see if the young would take hold of her teats again as at first and be dragged away in that manner, but they did not. It would be interesting to know if they seize hold of their mother by instinct when danger threatens, or if they simply retain the hold which they already have. I believe the flight of the family always takes place in this manner, with this species of mouse.

VII

The other day I was walking in the silent, naked April woods when I said to myself, "There is nothing in the woods."

I sat down upon a rock. Then I lifted up my eyes and beheld a newly constructed crow's nest in a hemlock tree near by. The nest was but little above the level of the top of a ledge of rocks only a few yards away that crowned the rim of the valley. But it was placed behind the stem of the tree from the rocks, so as to be secure from observation on that side. The crow evidently knew what she was about. Presently I heard what appeared to be the voice of a young crow in the treetops not far off. This I knew to be the voice of the female, and that she was being fed by the male. She was probably laying, or about beginning to lay, eggs in the nest. Crows, as well as most of our smaller birds, always go through the rehearsal of this act of the parent feeding the young many times while the young are yet a long way in the future. The mother bird seems timid and babyish, and both in voice and manner assumes the character of a young fledgeling. The male brings the food and seems more than usually solicitous about her welfare. Is it to conserve her strength or to make an impression on the developing eggs? The same thing may be observed among the domestic pigeons, and is always a sign that a new brood is not far off.

When the young do come the female is usually more active in feeding them than the male. Among the birds of prey, like hawks and eagles, the female is the larger and more powerful, and therefore better able to defend and to care for her young. Among all animals, the affection of the mother for her offspring seems to be greater than that of her mate, though among the birds the male sometimes shows a superabundance of paternal regard that takes in the young of other species. Thus a correspondent sends me this curious incident of a male bluebird and some young vireos. A pair of bluebirds were rearing their second brood in a box on the porch of my correspondent, and a pair of vireos had a nest with young in some lilac bushes but a few feet away. The writer had observed the male bluebird perch in the lilacs near the young vireos, and, he feared, with murderous intent. On such occasions the mother vireo would move among the upper branches much agitated. If she grew demonstrative the bluebird would drive her away. One afternoon the observer pulled away the leaves so as to have a full view of the vireo's nest from the seat where he sat not ten feet away. Presently he saw the male bluebird come to the nest with a worm in its beak, and, as the young vireos stretched up their gaping mouths, he dropped the worm into one of them. Then he reached over and waited upon one of the young birds as its own mother would have done. A few moments after he came to his own brood, with a worm or insect, and then the next trip he visited the nest of the neighbor again, greatly to the displeasure of the vireo, who scolded him sharply as she watched his movements from a near branch. My correspondent says: "I watched them for several days; sometimes the bluebird would visit his own nest several times before lending a hand to the vireos. Sometimes he resented the vireos' plaintive fault-finding and drove them away. I never saw the female bluebird near the vireos' nest."

That the male bird should be broader in his sympathies and affections will not, to most men at least, seem strange.

Another correspondent relates an equally curious incident about a wren and some young robins. "One day last summer," he says, "while watching a robin feeding her young, I was surprised to see a wren alight on the edge of the nest in the absence of the robin, and deposit a little worm in the throat of one of the young robins. It then flew off about ten feet, and it seemed as if it would almost burst with excessive volubility. It then disappeared, and the robin came and went, just as the wren returned with another worm for the young robins. This was kept up for an hour. Once they arrived simultaneously, when the wren was apparently much agitated, but waited impatiently on its previous perch, some ten feet off, until the robin had left, when it visited the nest as before. I climbed the tree for a closer inspection, and found only a well-regulated robin household, but nowhere a wren's nest. After coming down I walked around the tree and discovered a hole, and upon looking in saw a nest of sleeping featherless wrens. At no time while I was in the vicinity had the wren visited these little ones."

Of all our birds, the wren seems the most overflowing with life and activity. Probably in this instance it had stuffed its own young to repletion, when its own activity bubbled over into the nest of its neighbor. It is well known that the male wren frequently builds what are called "cock-nests." It is simply so full of life and joy and of the propagating instinct, that after the real nest is completed, and while the eggs are being laid, it gives vent to itself in constructing these sham, or cock-nests. I have found the nest of the long-billed marsh wren surrounded by half a dozen or more of these make-believers. The gushing ecstatic nature of the bird expresses itself in this way.

I have myself known but one instance of a bird lending a hand in feeding young not its own. This instance is to be set down to the credit of a female English sparrow. A little "chippie" had on her hands the task of supplying the wants of that horseleech, young cow-bunting. The sparrow looked on from its perch a few yards away, and when the "chippie" was off looking up food, it would now and then bring something and place it in the beak of the clamorous bunting. I think the "chippie" appreciated its good offices. Certainly its dusky foster-child did. This bird, when young, seems the most greedy of all fledgelings. It cries "More," "More," incessantly. When its foster parent is a small bird like "chippie" or one of the warblers, one would think it would swallow its parent when food is brought it. I suppose a similar spectacle is witnessed in England when the cuckoo is brought up by a smaller bird, as is always the case. Sings the fool in "Lear:"—

Last season I saw a cow-bunting fully grown following a "chippie" sparrow about, clamoring for food, and really looking large enough to bite off and swallow the head of its parent, and apparently hungry enough to do it. The "chippie" was evidently trying to shake it off and let it shift for itself, for it avoided it and flew from point to point to escape it. Its life was probably made wretched by the greedy monster it had unwittingly reared.