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The Frill-necked Lizard, or Frilled Lizard also known as the Frilled Dragon, (Chlamydosaurus kingii) is so called because of the large ruff of skin which usually lies folded back against its head and neck. The neck frill is supported by long spines of cartilage, and when the lizard is frightened, it gapes its mouth showing a bright pink or yellow lining, and the frill flares out, displaying bright orange and red scales. The frill may also aid in thermoregulation. They may grow up to one metre in total length. They often walk quadrupedally when on the ground. When frightened they begin to r...

Blue-tongued lizards are the largest members of the skink family (Scincidae). Skink lizards have overlapping scales that are usually smooth and contain small plates of bone. There are more than 300 species of skinks in Australia. Australia has six species of blue-tongued lizards and three are common and widespread in New South Wales. The Eastern Blue-tongue (Tiliqua scincoides scincoides) occurs throughout much of the state, west to about Cobar but the Blotched Blue-tongue (Tiliqua nigrolutea) is restricted to highland areas from the Victorian border to the Blue Mountains. The Shingleback ...

The Gila monster is the largest lizard native to the United States. It is one of only two types of poisonous lizard. It is large and stout, with short legs and strong claws, and a short, thick sausage-shaped tail. Its head is large, and it has wide jaws containing sharp teeth and venom glands in the lower jaw. Gilas measure 12 to 24 inches long and weigh 2 to 3 pounds. Its scales are beaded pink, yellow, orange and black. It has a black face and feet.

The blotched blue-tongued lizard resides in southern parts of the Australian state of New South Wales and a smidgeon of the neighboring state of South Australia. It is restricted to the highland areas between the Victorian border and the Blue Mountains. It also occurs on Tasmania and the islands of the Bass Strait.

Average weight: between 600 and 2,000 pounds. Nile crocs are characterized by their lizard-shaped bodies and scaly hides. Coloring: ranges from drab green or brownish to a blackish tone on the dorsal side, much lighter on the ventral side. The eyes and nostrils of crocodiles are situated on the top of the head so they can see and breathe while the rest of their body remains almost totally underwater. In the water, crocs have large, oar-like tails that they use to swim. Only their rear feet are webbed, and they are rarely used in movement underwater.

The caiman is small in comparison to other lizard species. It has a short tail and a short, smooth head with a high skull and upturned snout. They also have a pronounced overbite. Their irises are generally brown but can take on greenish tinge. Juveniles are brown with banding; adults have chocolate brown heads, and their jaws are flecked with white bands. Caimans closely resemble alligators except for the small bony scales embedded in the skin of their belly.