Chameleons are proverbial for the way in which they rapidly change color if placed among fresh surroundings, so as to harmonize with them. This variable general coloration is protective, because it makes the chameleon invisible to its foes, and also aggressive, as the insect prey of the little lizard are thereby lulled into a sense of false security. The digits are bound together into two groups, and a tongs-like grasping organ of great efficiency is thus constituted. The chameleon is also notable for the relatively enormous distance to which it can suddenly shoot out its sticky club-shaped tongue, for the purpose of seizing insects or other small creatures.
Flying Dragon (Draco volans) is found on trees in the island of Java. It generally frequents the trees along the banks of great rivers, in the leaves of which are numerous insects, upon which the flying dragon feeds. As it is as green as the leaves of the trees, it can only be recognized by an experienced eye. It is hunted for its delicate flesh, and also for the eggs, which are found deposited, often fifteen to twenty at a time, in a hollow in the ground.
Gecko (Hemidadylus maculatus) is a native of the East Indies and China. At dawn these reptiles creep out of their holes, and with dilated eyes look around for prey. As soon as they catch sight of it, the clumsy creatures spring upon it from a distance of four to six inches, with all the violence and rapidity of an animal of prey. Sucking pads on the feet of the gecko enable it to cling firmly to the most slippery surface, and to crawl about without slipping; its claws, which are sharp and retractile, are also useful to this reptile.
Iguana (Iguana tuberculata) is found in the East Indies and in South America. It lives in trees along the banks of rivers, feeding upon the insects. Its usual color is dark olive green. Its flesh is considered a delicacy, being tender and very much like that of a chicken. The eggs, of which the female deposits from four to six dozen at a time, are also eaten.
SNAKES OR SERPENTS
have elongated bodies, covered with plates or scales, and no feet. Many kinds have no poisonous fangs in the upper jaw. Serpents reproduce their species from eggs, and feed upon living animals; those found in colder regions sleep through the winter.
HOW THE SNAKE
TRAVELS
The vertebrae are very numerous. With the exception of the most anterior (atlas), all bear ribs, which are very freely movable and are the snake’s main organs of locomotion. Snakes are capable of moving with great swiftness. The body undulates from side to side—not up and down—in a wriggling or writhing fashion. The extremely flexible backbone permits of this, but to guard against dislocation the vertebrae are connected by extra locking-joints, which only permit a certain amount of play. It is, however, comparatively easy to break the back of a snake by a sharp blow with a stick or whip.
MOUTH AND SENSE ORGANS
OF SNAKES
Snakes are typically carnivorous, and many of them are furnished with powerful poison fangs. The tongue is forked, can be rapidly protruded and retracted, and is an efficient sense organ. Upon it and the well-developed nostrils the snakes largely depend, for neither sight nor hearing is very acute. There are no eyelids, the eyes being covered over by a transparent convex scale. The whole skin is covered with scales, which are folds of the epidermis, continuous with one another. In consequence, when the snake casts its coat—which occurs several times in the year—it casts it in one piece, this being a complete replica of the snake.