FLIGHT — FEINT — RESISTANCE IN COMMON BY SOCIAL ANIMALS — SENTINELS.

Studying the animal kingdom in the manner here adopted, that is to say by passing in review the various manifestations of zoological life, we are necessarily led to find certain industries which are opposed to others. We have seen the various methods of hunting; but attack calls forth defence. In the struggle for life we find the action of beings on other beings, and the re-action of these latter; the final result is the expression of the difference between the two according as one or the other is stronger.

Flight. — Just as the most rudimentary method of attack is simple pursuit, so the most simple and natural method of defence is flight; but if very fleet animals like hares, gazelles, and deer can escape by simply exerting their maximum rapidity, it is not always thus, and certain species exercise in flight perfected methods appropriate to circumstances, and so raise this method of defence to an art.

Of all animals the Ape most skilfully directs his flight. There is no question that in his intelligence we may find every rudiment of our own; but of all his qualities none more nearly approximates him to us than his courage. There are no animals, not even the great beasts of prey, who are so brave as Man and the Ape, and who are capable of so much presence of mind. It is perhaps this bravery which, joined to his sociability, has most contributed to assure the supremacy of the one. As to the other, the road has been barred to him by his better-endowed cousin; he is disappearing before Man, and not before nature or other animals. In thinly-inhabited regions he is still the king. It is generally considered that the Lion is the incarnation of courage, but he is the strongest and the best armed; there is none before whom he need tremble. In captivity he allows himself to be struck by the tamer, which the most miserable ape would never suffer. The Lion will struggle with extreme energy without calculating the difference of strength between his opponent and himself, and will resist as long as he is able to move. The Ape directs all his courage and presence of mind to order his flight when he has recognised a danger that is insurmountable. He does not act like those infatuated beasts who lose their head and rush away trembling, in their precipitation paralysing a great part of their resources. A band of apes in flight utilises all obstacles that can be interposed between themselves and the pursuer; they retire without excessive haste and take advantage of the first shelter met with; a female never abandons her young, and if a young one remains behind, and is in danger of being taken, the old males of the troop go back boldly to save it at the peril of their lives. In this connection many heroic facts have been narrated. This animal has too frequently been judged by comparison with ourselves; he has been regarded as a human caricature and covered with ridicule. We obtain a very much higher idea of him if we compare him with other animals. Always and everywhere there has been a prejudiced insistence on his defects; we perceive them so easily because they are an exaggeration of our own; but he also possesses qualities of the first order.

As an example of flight arranged with intelligence, we have already seen how the Formica fusca profits by the difficulty experienced by the Polyergus in climbing. It hastily gains the summit of a blade of grass, to place there in safety the larvÆ which the others wish to carry away. The ruses adopted in flight are as varied as those of attack. Every animal tries to profit as much as possible by all his resources.

Larks, a feeble race of birds, rise higher in the air than any rapacious bird, and this is often a cause of safety. Their greatest enemy is the Hobby (Hypotriorchis sublutes). They fear him greatly, so that as soon as one appears singing ceases, and each suddenly closes his wings, falls to the earth and hides against the soil. But some have mounted so high to pour out their clear song that they cannot hope to reach the earth before being seized. Then, knowing that the bird of prey is to be feared when he occupies a more elevated position from which he can throw himself on them, they endeavour to remain always above him. They mount higher and higher. The enemy seeks to pass them, but they mount still, until at last the Hobby, heavier, and little accustomed to this rarefied air, grows tired and gives up the pursuit.37The Gold-winged Woodpecker of the United States (Colaptes auratus) often escapes Falcons either by throwing himself into the first hole that he finds, or if he cannot find one, through seizing the trunk of a tree with his claws. As he is a very good climber, he describes rapid spirals around it, and the falcon cannot in flying trace such small circles. By this method the Colaptes usually escapes.38

The Fox, who is so ingenious in hunting, is not less so when his own safety is concerned. He knows when it is best to flee or to remain; he is suspicious in a surprising degree, not only of man but also of the engines which man prepares against him. He recognises them or smells them. Certain facts almost lead us to suspect that he understands their mechanism. When one of them has been surprised in his hole, and the trap has been placed before every opening, he will not emerge from the burrow. If hunger becomes too imperious, he recognises that patience will only change the manner of his death, and then he decides to dare fate; but previously he had done everything to flee without passing over the snare. As long as he had claws and strength he hollowed out the earth to form a new issue, but hunger rapidly exhausted his vigour and he was not able to complete the work. Foxes thus trapped have recognised immediately when one of these engines went off, either owing to another animal being caught or from some other reason. In this case the captive understands very well that the mechanism has produced its effect, that it is no longer to be dreaded, and he boldly emerges.It has happened that foxes have been caught in a trap by a paw or else by the tail, when delicately endeavouring to extract the bait. Recognising the manner in which they are retained prisoners, certain of them have had the intelligence and the courage to cut off with their teeth the part engaged in the trap, and to escape thus mutilated. St. John knew a fox who thus escaped by amputating a paw, and who was able to earn his living for three or four years subsequently, when he was finally caught.

In Australia great kangaroo hunts are organised. Generally the capture is sufficiently easy, and the dogs are able to seize the kangaroo, but sometimes he makes a long and rather original defence. If possible, he directs his flight towards a river. If he reaches it he enters, and, thanks to his great height, he is able to go on foot to a depth where the dogs are obliged to swim. Arrived there, he plants himself on his two posterior legs and his tail, and, up to his shoulders in the water, awaits the arrival of the pack. With his anterior paws he seizes by the head the first dog who approaches him, and, as he is more solidly balanced than his assailant, he holds the dog’s nose beneath the water as long as he can. Unless a second dog speedily comes to the rescue the first is inevitably drowned. If a companion arrives to free him, he is so disturbed by this unexpected bath that he regains the bank as quickly as possible, and has no further desire to attack this suffocating prey. A strong and courageous old male can thus hold his own against twenty or thirty dogs, drowning some and frightening others, and the hunter is obliged to intervene and put an end to this energetic defence by a bullet.39Feint. — Many animals, when they cannot escape danger by flight, seek safety by various feints. The device of feigning death is especially widespread.

Many coleopterous insects and Spiders simulate death to perfection, although it has been ascertained that they do not always adopt the attitude which members of their species fall into when really dead. But they remain perfectly motionless; neither leg nor antenna stirs. McCook, who has devoted such loving study to Spiders, remarks in his magnificent work, that the Orbweavers, especially, possess this habit. “One who touches an Orbweaver when hanging upon its web will often be surprised to see it suddenly cast itself from the snare, or appear to drop from it, as though shot off by some unseen force. Unless he understands the nature of the creature he will be utterly at a loss to know what has become of it. In truth it has simply dropped upon the ground by a long thread which had been instantaneously emitted, and had maintained the Aranead in its remarkable exit, so that its fall was not only harmless, but its return to the web assured. The legs are drawn up around the body, and to the inexperienced eye it has the external semblance of death. In this condition it may be handled, it may be turned over, it may be picked up, and, for a little while at least, will retain its death-like appearance.” Preyer, who has studied this phenomenon in various animals, comes to the conclusion that it is usually due to unconsciousness as the result of fright.40 McCook is unable to accept this theory of kataplexy, so far as Spiders are concerned. “I have frequently watched Spiders in this condition,” he observes, “to determine the point in question, and their behaviour always impressed me as being a genuine feigning of death, and therefore entirely within their volition. The evidence is of such indefinite nature that one can hardly venture to give it visible expression, but my conviction is none the less decided. I may say, however, that my observations indicate that the Spiders remained in this condition as long as there seemed to be any threatened danger; now and again the legs would be relaxed slightly, as though the creature were about getting ready to resume its normal condition, but at the slightest alarm withheld its purpose and relapsed into rigidity. The slight unclasping of the legs, the faint quivering indications of a purpose to come to life, and then the instant suppression of the purpose, were so many evidences that the power of volition was retained, and that the Aranead might have at once recovered if it had been disposed to do so. Again, I think that I have never noticed anything like that gradual emergence from the kataplectic condition which one would naturally expect if the act were not a voluntary one. On the contrary, the spider invariably recovered, immediately sprang upon its legs, and hoisted itself to its snare, or ran vigorously away among the grasses.”41

Among fish, the Perch and the Sturgeon feign death; according to Couch,42 the Landrail, the Skylark, the Corncrake adopt the same device. Among mammals, the best-known example is probably the Opossum.

An Opossum (Didelphys azarÆ) of South America enters farms to devastate the poultry yards. When he is discovered he runs away, but is soon caught, and blows from sticks rain upon him. Seeing that he cannot escape correction he seeks at least to save his life. Letting his head fall and straightening his inert legs he receives the blows without flinching. Often he is considered dead, and abandoned. The cunning little beast, who desires nothing better, arises, shakes himself, and rather bruised, but at all events alive, takes his way back to the wood.

The Argentine Fox (Canis azarÆ), when caught in a trap or run down by dogs, though it fights savagely at first, after a time drops down and apparently dies. “When in this condition of feigning death,” Mr. W. H. Hudson remarks, “I am quite sure that the animal does not altogether lose consciousness. It is exceedingly difficult to discover any evidence of life in the opossum, but when one withdraws a little way from the feigning fox, and watches him very attentively, a slight opening of the eye may be detected; and, finally, when left to himself, he does not recover and start up like an animal that has been stunned, but slowly and cautiously raises his head first, and only gets up when his foes are at a safe distance. Yet I have seen guachos, who are very cruel to animals, practise the most barbarous experiments on a captive fox without being able to rouse it into exhibiting any sign of life. This has greatly puzzled me, since, if death-feigning is simply a cunning habit, the animal could not suffer itself to be mutilated without wincing. I can only believe that the fox, though not insensible, as its behaviour on being left to itself appears to prove, yet has its body thrown by extreme terror into that benumbed condition which simulates death, and during which it is unable to feel the tortures practised on it. The swoon sometimes actually takes place before the animal has been touched, and even when the exciting cause is at a considerable distance.”43

It is probably a measure of prudence which impels certain birds to imitate successively the cries of neighbouring animals, in order to persuade their enemies that all the beasts in creation are brought together in this spot except themselves. It is perhaps going a little too far to suppose so reflective and diplomatic a motive, but it is not doubtful that in certain cases this custom can be very useful to them by putting their enemies on the wrong scent. In North America nearly all the species of the Cassique family have this custom. If they wish to deceive the ears of the great Falcons who watch them — or is it simple amusement? — they interrupt their own song to introduce the most varied melodies. If a sheep bleats, the bird immediately replies to the bleating; the clucking of a turkey, the cackling of a goose, the cry of the toucan are noted and faithfully reproduced. Then the Cassique returns to his own special refrain, to abandon it anew on the first opportunity.44

Not only do animals thus feign death in order to secure their own safety, but the female sometimes endeavours to attract an enemy’s attention and feigns to be wounded in order to decoy him away from her young. This trick is adopted especially by birds. In illustration of this it will be sufficient to quote from Bendire’s Life Histories of North American Birds some observations by Mr. Ernest Thompson of Toronto, regarding the Canadian Ruffled Grouse (Bonasa umbellus togata), commonly called the Partridge by Canadians: — “Every field man must be acquainted with the simulation of lameness, by which many birds decoy or try to decoy intruders from their nests. This is an invariable device of the Partridge, and I have no doubt that it is quite successful with the natural foes of the bird; indeed it is often so with Man. A dog, as I have often seen, is certain to be misled and duped, and there is little doubt that a mink, skunk, racoon, fox, coyote, or wolf would fare no better. Imagine the effects of the bird’s tactics on a prowling fox: he has scented her as she sits; he is almost upon her, but she has been watching him, and suddenly, with a loud ‘whirr,’ she springs up and tumbles a few yards before him. The suddenness and noise with which the bird appears cause the fox to be totally carried away; he forgets all his former experience, he never thinks of the eggs, his mind is filled with the thought of the wounded bird almost within his reach; a few more bounds and his meal will be secured. So he springs and springs, and very nearly catches her, and in his excitement he is led on, and away, till finally the bird flies off, leaving him a quarter of a mile or more from the nest.

“If instead of eggs the Partridge has chicks, she does not await the coming of the enemy, but runs to meet and mislead him ere yet he is in the neighbourhood of the brood; she then leads him far away, and returning by a circuitous route, gathers her young together again by her clucking. When surprised she utters a well-known danger-signal, a peculiar whine, whereupon the young ones hide under logs and among grass. Many persons say they will each seize a leaf in their beaks and then turn over on their backs. I have never found any support for this idea, although I have often seen one of the little creatures crawl under a dead leaf.”45

Resistance in common by social animals. — If neither flight nor feint has saved an animal from the hunter, he naturally fights as long as he can, but this struggle in extremis is rarely crowned with success. Certain species, especially those which live in society, are able nevertheless, by uniting their efforts, to resist enemies who would easily triumph over them if they were isolated.

Among tribes of Apes mutual assistance, as described by Brehm, is common. When by chance a bird of prey, such as an eagle, has thrown himself on a young ape who is amusing himself far from the maternal eye, the little one does not let himself be taken without resistance; he clings to the branches and utters shrill and despairing cries. His appeals are heard, and in an instant a dozen agile males arrive to save him; they throw themselves on the imprudent ravisher and seize him, one by the claw, another by the neck, another by a wing, pulling him about and harassing him. The bird struggles as well as he can, distributing around him blows from talons and beak. But he is often strangled, and when his temerity does not receive this extreme punishment, the feathers which fall from him when he flies away bear witness that he has not emerged unscathed from the scuffle.

Animals like Buffaloes resist by a common defence the most terrible Carnivora. Even the Tiger is their victim, although if one of them met that wild beast alone he would surely become its prey. Being very agile, the tiger can reach by one leap the back of the ruminant, whose brutal and massive force cannot thus be exercised; but the feline who falls into the midst of a troop fares very badly. One buffalo falls on him with lowered horns, and with a robust blow of the head throws him into the air. The tiger cannot regain his senses, for as soon as he reaches the ground, and often even before, he is again seized and thrown towards other horns. Thus thrown from one to another like a ball, he is promptly put to death.

The less terrible Carnivora give Buffaloes no trouble. Wolves do not dare to attack them when they are united; they await in ambush the passage of some strayed calf, and rapidly gain possession of it before the rest of the flock are aware, or they would dearly pay for their attack.

The Bisons of North America, near relatives of the Buffaloes, also repulse Wolves in common; and if Man succeeds better against them it is owing to the skill which he shows in hiding himself and not attracting their attention. Every one knows how Indians hunt the Bison with arrows, and his pursuit is very risky to the hunter, for he must not be discovered by the game, as he would then be trodden underfoot or disembowelled. In the immense prairies where these ruminants feed, a few Indians covered by bisons’ skins advance on all fours, so that nothing betrays their presence. The victims fall one by one beneath silent blows, and their companions, who can see nothing suspicious in the neighbourhood, are not disturbed, supposing them, no doubt, to be peacefully resting.

It is not only against other animals that these great mammals have to defend themselves; they are much afraid of heat, and they are accustomed, especially in the south of Persia, to ruminate while lying in the water during the hot hours of the day. They only allow the end of the snout, or at most the head, to appear. It is a curious spectacle when fording a river to see emerge from the reeds the great heads and calm eyes of the Buffaloes, who follow with astonishment all the movements of the horsemen, although nothing will disturb their sweet and fresh siesta.

But let us return to defences arranged in common. Horses are extremely sociable, and in the immense pampas of South America those who become wild again live in large troops. In difficult circumstances they help one another. If a great danger threatens them all the colts and mares assemble together, and the stallions form a circle round the group, ready to drive back the assailant. But they do not accomplish this manoeuvre in the presence of an enemy of small importance. When a wolf appears on the plain all the males run after him, seeking to strike him with their feet and kill him, unless prompt flight delivers him from their blows.

The sociable humour of these horses makes them compassionate towards their fellows who are enslaved by man, and if a harnessed cart meets on its road a free band, it is a serious matter to the owner. They run up and surround the enslaved horse, saluting him with their cries and gambols, having the air of inviting him to throw his harness to the winds and follow them on the plain, where grass grows for all without work. Naturally the driver endeavours to preserve his noble conquest, and distributes blows with the whip to those who wish to debauch it. Then the wild horses become furious, and throw themselves on the vehicle; they break it with their feet and cut their comrade’s traces with their teeth to enable him to share their own free life. The enterprise satisfactorily concluded, they gallop away neighing in triumph.

It is owing to their union in large bands that Crows have so little to fear from diurnal birds of prey; if one approaches, they do not hesitate to throw themselves on him altogether. The Great Horn Owl, however, causes many ravages among them; for when asleep at night the Crow is without defence against the ravisher, for whom, on the contrary, obscurity is propitious. Thus they recognise him as a hereditary enemy, and never allow an opportunity of revenge to pass without profiting by it. If by chance an owl appears by day and one of them perceives him, immediately a clamour arises — a veritable cry of war; all those who are in the neighbourhood fly to the spot, and business ceases; the nocturnal bird of prey is assaulted, riddled with blows from beaks, stunned, his feathers torn out, and, notwithstanding his defence, he succumbs to numbers.In all the preceding examples the social species unite for the common security the forces and effects which they can derive from their own organs.

I have spoken of the Apes and described how they defend themselves with their hands and teeth; but in certain cases they use weapons, employing foreign objects like a club or like projectiles.

Acts of this nature are considered to indicate a high degree of development, and it has often been repeated that they are the appanage of man alone; we have, however, seen the Toxotes, who, like all fishes, is not particularly intelligent, squirt water on to his victims. It is not easy to understand how a greater intellectual effort is required to throw a stone with the hand than to project water with the mouth. This is what the apes do, throwing on their assailants from the heights of trees everything which comes to hand: cocoa-nuts, hard fruits, fragments of wood, etc.

Baboons (Cynocephali) who usually live in the midst of rocks protect their retreat by rolling very heavy blocks on to their aggressors, or by forcibly throwing stones about the size of the fist. As these bands may contain from a hundred to one hundred and fifty individuals, it is a veritable hail of stones of all sizes which they roll down from the heights of the mountains where they find shelter.

Sentinels. — Not only do Apes know how to face danger or to avoid it by a prudent flight, but they also seek to foresee it, and to avoid exposing themselves to it. A troop of Apes, according to Brehm, generally places the leadership in the hands of a robust and experienced male. This primitive royalty is founded partly on the confidence inspired by an old chief, and partly by the fear inspired by his muscular arms and ferocious canine teeth. (Fig. 9.) He gives himself a great deal of trouble for the security of his subjects, and does not abuse the authority which he possesses. Always at the head, he leaps from branch to branch, and the band follows him. From time to time he scales a tall tree, and from its heights scrutinises the neighbourhood. If he discovers nothing suspicious a particular guttural grunt gives information to his companions. If, on the contrary, he perceives some danger he warns them by another cry, and all draw in ready to follow him in his retreat, which he directs in the same way as he guided the forward march.

Apes are not alone in relying on the experience of one of their members. Many other animals act in the same way: antelopes, gazelles, elephants, who advance in troops always conducted by an old male or female who knows all the forest paths, all the places favourable to pasture, and all the regions which must be avoided.

Others, more democratic, instead of giving up the care of their safety to one individual, which cannot be done without abdicating some degree of individual independence, dispose around the place which they occupy a certain number of sentinels charged to watch over the common safety. This custom exists among prairie dogs, moufflons, crows, paroquets, and a great many other animals. The sentinels of the crows are not only always on the watch, but they are extremely discriminating; they do not give a warning at the wrong time. It is certain that these birds can distinguish a man armed with a gun from another who merely carries a stick, and they allow the second to approach much nearer than the first before giving the alarm.

Paroquets of all species live in joyous and noisy bands. After having passed the night on the same tree they disperse in the neighbourhood, not without having first posted watchers here and there, and they are very attentive to their cries and indications.

The great Aras or Macaws, the large and handsome parrots of the Andes, act with much prudence when circumstances make it advisable, and they know when they ought to be on their guard. When they are in the depths of the forest, their own domain, they gather fruits in the midst of a deafening noise; each one squalls and cries according to his own humour. But if they have resolved to pillage a field of maize, as experience has taught them that these joyous manifestations would then be unseasonable and would not fail to attract the furious proprietor, they consummate the robbery in perfect silence. Sentinels are placed on the neighbouring trees. To the first warning a low cry responds; on the second, announcing a nearer danger, all the band fly away with vociferations which need no longer be restrained. The common Crane (Grus cinerea), still more far-seeing to avoid a possible future danger, despatches scouts who are thus distinct from sentinels who inform their fellows of present danger.46

When these birds have been disturbed in any spot, they never return without great precautions. Before arriving, they stop; a few only go circumspectly forward, examining everything, and coming back to make their report. If this is not satisfactory the troop remains suspicious, sending new messengers. When they are at last assured that there is really nothing to fear, the rest follow.

Thus by the most varied methods animals endeavour to save their threatened lives, and succeed to some extent in attaining safety. Destruction and the chase on one side, conservation and flight on the other: these are the two chief acts which occupy living beings. Many, however, less threatened, succeed in perfecting their manner of life, and employ their industry in less pressing occupations than eating others or preventing others from eating them.