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Like most reptiles, an iguana has a three-chambered heart with two atria, one ventricle, and two aortae with a systemic circulation. [14] The muscles of an iguana are very light in color due to the high proportion of fast-twitch, glycolytic muscle fibers (type A).
The Jamaican iguana was believed to be extinct in 1948. [6] A dead adult specimen was found in 1970. The species was rediscovered in August 1990 when a live adult male iguana was chased into a hollow log by a dog of Edwin Duffus, a hog hunter in the Hellshire Hills. By the time he got there, the dog had injured the animal but that was the ...
At cold temperatures their muscles are less efficient, but their relatively high temperature preference is also related to the optimal temperature for digesting the algal food in their gut. [27] [50] As an ectothermic animal, the marine iguana can spend only a limited time in cold water diving for algae. Afterwards it basks in the sun to warm up.
The green iguana (Iguana iguana), also known as the American iguana or the common green iguana, is a large, arboreal, mostly herbivorous species of lizard of the genus Iguana. Usually, this animal is simply called the iguana. The green iguana ranges over a large geographic area; it is native from southern Brazil and Paraguay as far north as Mexico.
The desert iguana is a medium-sized lizard which averages 41 cm (16 in) in total length but can grow to a maximum of 61 cm (24 in) including the tail. [7] They are pale gray-tan to cream in color with a light brown reticulated pattern on their backs and sides.
Home security video from Wednesday in Miami Beach shows a large, seemingly cold-stunned iguana hitting the concrete with a loud thwack after falling from its perch in a tree.
Much of those 200 pounds is pure muscle. If you check out the video above you will get a chance to see some very buff male kangaroos lounging around a wildlife park in Australia. Kangaroos live in ...
The physiology of underwater diving is the physiological adaptations to diving of air-breathing vertebrates that have returned to the ocean from terrestrial lineages. They are a diverse group that include sea snakes, sea turtles, the marine iguana, saltwater crocodiles, penguins, pinnipeds, cetaceans, sea otters, manatees and dugongs.