Geckos are small lizards belonging to the family Gekkonidae. There are nearly 2000 species of geckos throughout the world and they are divided into three sub families: Sphaerodactylus, Gekkoninae and Eublepharinae.
Geckos are popular for possessing the unique feature of producing different sounds. These sounds are used for communication and may be high or low pitched depending on different species.
Geckos are also unique in the regard of their special toe pads which allow them to climb any type of surface easily.
Geckos come in various patterns and colors such as purple, pink, blue, and black, and are among the most colorful lizards in the world.
The iguana family includes some of the largest lizards found in the Americas, with their whiplike tails making up about half of that length.
Like other reptiles, iguanas are cold-blooded, egg-laying animals with an excellent ability to adapt to their environment. Species of iguanas vary greatly in size, color, behavior, and their endangered status in the wild.
Some species, like the green iguana Iguana iguana, are quite common; other species, like the Fijian banded iguana Brachylophus bulabula, are endangered.
In the reptile world there are some bizarre shapes and colors. Some of the most striking variations are found in the chameleons. These colorful lizards are known for their ability to change their color, their long sticky tongue, and for their eyes, which can be moved independently of each other
The chameleon's eyes are the most distinctive among the reptiles. Each eye has a scaly lid shaped like a cone, with only a small, round opening in the middle for the pupil. The chameleon can rotate and focus its eyes separately to look at two different objects at the same time! This gives it a full 360-degree view around its body.
How chameleons change color is a fascinating and complicated process. First of all, they don't really change color to match their surroundings, and they cannot change to any and all colors. So how do they do it? Chameleons have four layers of skin: the outer, protective layer called the epidermis; the chromatophore layer that contains yellow and red pigments; the melanophore layer that contains the dark pigment melanin and can create brown and black colors or reflect blue; and the nether layer, which only reflects white. Nerve impulses and hormone changes cause the color cells in these layers to expand and shrink, and the blending of the different layers creates the colors and patterns that we see.
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