LIZARDS (order Squamata) (suborder Lacertilia)

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Keeping lizards as “pets” can be a very challenging task, because, it has been found that many species will not thrive in captivity.

When looking for a lizard to buy or catch, keep in mind some of the basic requirements the animal should have while you are choosing a lizard. The lizard should be alert and active. Check its mouth for signs of sores, bad teeth or gums, or other indications of mouth rot. Check the eyes for discharges, make sure the eyes are not sunken into the head. Observe it walking to insure that there is no damage to the limbs. Do not accept a lizard that has a discharge from the nose, this could be a symptom of a respiratory infection.

Lizards vary a great deal in their dietary requirements, therefore, it is very important that you are very sure of the animal’s identification before you purchase or collect it. You cannot always rely on the pet store dealer for an accurate identification. If the lizard is one that you have caught, then you can refer to a field guide for a positive identification.

Some lizards are strictly insect eaters, others eat only fruits and vegetables, some will only eat meat, a few lizards will only eat eggs, and then there are some that will eat nearly anything. Most insectivores will only eat live insects. If it is hard to get live insects, you may be able to get the lizard to accept dead food by offering it on the end of a thin wire. By moving the insect, the lizard will think it is alive, and often will grasp the food. Insectivores require a large amount of food, and the food should be varied: don’t feed all meal worms, or all crickets, but try to offer a variety of insects.

The vegetarians or herbivores need to be fed a mixed variety of fruits and vegetables. Often, color will induce a lizard to eat, so always include some apple or tomato to the diet if the lizard doesn’t seem interested in food. The meat eaters are often the easiest to induce to eat. Canned dog food is usually used as a basic, but whole mice are much more of a balanced diet. Sometimes it is necessary to skin the mouse in order to get the lizard to eat it. Whatever dietary requirements your lizards have, their food should be supplemented with a vitamin and mineral powder. Steamed bone meal is often used. Just sprinkle a small amount on the food, and then mix it in so the lizards will take it in with their food.

Although the size of the cage is usually not critical for lizards, cage props may be essential in order to insure that the animal thrives. If the lizard is a burrower in the wild then it is often necessary that it be able to burrow in captivity. If the animal is normally arboreal, Then you must have a branch for it to climb on. Because of this, it is most important that you know what species of lizard you have; then learn as much as possible about its habits and habitat.

Besides cage decorations, always have clean drinking water in the cage. Many species of lizards do not drink from a water dish. They obtain their water from dew drops or rain drops that they lap with their tongues. It is advisable to spray the lizards’ cage daily with a fine mist of warm water.

Common Iguana
Iguana iguana

An important requirement for lizards is sunlight. Often, a lizard seems to be eating and doing well in captivity, but suddenly dies. This may be due to a lack of sunlight. In many instances the animal may not eat at all. If direct sunlight is not available, it can be substituted by the use of a vita-lite bulb. This bulb, which looks like a fluorescent bulb, can often be purchased from a large plant store or directly from the manufacturer.

Lizards often have a more precise temperature requirement than other reptiles. A daytime temperature range of 85 to 90°F, and dropping to 80°F at night is usually best for the tropical species. Many of the North American desert species also require a high daytime temperature. Adult tegus and monitors can be kept at slightly lower temperatures, usually from 72 to 76°F. As with snakes, the temperature in the lizard cage can be controlled with a light bulb. The size of the cage will determine the size of the bulb needed. As previously stated, temperature can be critical, and many lizards will die if not kept warm enough. Never guess at the cage temperature—always have a small thermometer in the cage, and check it often.

Keeping lizards healthy can be a challenging but also frustrating experience. There is very little information available on lizard diseases. These reptiles are susceptible to many of the diseases that snakes get, and often the symptoms are the same. Lizards can get mouth rot, respiratory infections, parasites (both internal and external), eye infections, and other common reptile diseases. One disease that is common in lizards is impaction of the intestines. This is common in insect eaters that are being fed only meal worms. Often, the impaction is not noticed until after the animal dies. If the lizard is alone, keep track of its food intake and fecal output. If an extended period goes by and the lizard is not making fecal matter, then there could be a physical blockage in the intestine. Put a little mineral oil up the cloaca—this will help to loosen the blockage. The best cure is preventive procedures. Feed a variety of insects if possible, but don’t feed all meal worms.

The other diseases that lizards are susceptible to can be treated by using the same medications used for snakes. Dosages, of course, must be less, for we are usually dealing with a much smaller animal.

Good husbandry along with preventive medicine are the best ways to keep your lizard healthy. Keep the cage clean, feed a proper diet, supply sunlight or artificial light, and most important: know the lizards’ requirements and natural history.

The following is a list of lizards that usually can be kept successfully in captivity:

Green Iguana: A lizard from Central and South America, mostly herbivorous, is arboreal, and can grow to 6 feet.
Tegu: A large carnivore from South America, feeds on mice, not tame.
Monitors: Large carnivores from the Old World, most do well.
Glass Lizards: Insectivores from North America, will eat dog food, tail breaks off easily.
Tokay Gecko: Will eat any small animal or insect. Make good pets.
Amevias: Same as tegu.

Great Plains Skink
Eumeces obsoletus

Most lizards from Missouri should be kept during the summer, then released in early fall where they were collected. Lizards that do not make good pets are: horned lizards, anoles, collared lizards and fence lizards.

As with all animals, there are exceptions to the rule; an iguana may refuse to eat, or a collared lizard may do well for years. Each reptile within a species may act differently from how the whole species may act in captivity. Knowing the lizards’ habitat and habits will be the deciding factor in keeping the animal alive and healthy in captivity.

R.N.B.

                                                                                                                                                                                                                                                                                                           

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