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In many cases the cast skin peels backward over the body from head to tail, in one piece like an old sock. A new, larger, and brighter layer of skin has formed underneath. [5] [7] An older snake may shed its skin only once or twice a year, but a younger snake that is still growing may shed up to four times a year. [7]
A male red-eyed crocodile skink can be identified by the white pads (pores) on his feet. [4] Female red-eyed crocodile skinks have two working ovaries, but only the right oviduct is functional; therefore, eggs from the left ovary must migrate across the body cavity prior to oviposition. [5]
The male caecilians have a long tube-like intromittent organ, the phallodeum, [52] which is inserted into the cloaca of the female for two to three hours. About 25% of the species are oviparous (egg-laying); the eggs are laid in terrestrial nests rather than in water and are guarded by the female.
The hemipenis is the intromittent organ of Squamata, [4] which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have the paired genitalia remaining separate. [5]
Ophionyssus natricis, the reptile mite, is a parasitic mite most commonly found on snakes, but also occurring on captive lizards, turtles, crocodiles, and other reptiles. [1] The parasites feed on snakes, which cause the bodies of the mites to be engorged with blood and fluids from the snake.
The result is the legs can be held almost vertically beneath the body when on land, and the foot swings during locomotion as the ankle rotates. [ 51 ] Crocodilians, like this American alligator, can "high walk" with the lower limb portions held almost vertically, unlike other reptiles.
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Western shingleback Rottnest Island shingleback. Tiliqua rugosa, most commonly known as the shingleback skink, stumptail skink or bobtail lizard, is a short-tailed, slow-moving species of blue-tongued skink (genus Tiliqua) endemic to Australia.