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Salvator merianae has recently been shown to be one of the few partially warm-blooded lizards, having a temperature up to 10 °C (18 °F) higher than the ambient temperature at nighttime; [35] however, unlike true endotherms such as mammals and birds, these lizards only display temperature control during their reproductive season (September to ...
Warm-blooded is a term referring to animal species whose bodies maintain a temperature higher than that of their environment. In particular, homeothermic species (including birds and mammals ) maintain a stable body temperature by regulating metabolic processes.
Though these cold-blooded reptiles prefer warm climes in general, several different species of rattlesnakes can be found all across the continental United States - yes, even in New England!
Having a lifespan of between 15 to 20 years, an Argentine Black and White Tegu differs from most other reptiles on this list because it’s one of the first known warm-blooded lizards.
Traditionally, it was assumed that extinct reptile groups were cold-blooded like modern reptiles. New research during the past decades has led to the conclusion that some groups, such as theropod dinosaurs and pterosaurs, were very likely warm-blooded. Whether perhaps plesiosaurs were warm-blooded as well is difficult to determine.
Dinosaurs were initially cold-blooded, but global warming 180 million years ago may have triggered the evolution of warm-blooded species, a new study found.
The Dinosaur Heresies: New Theories Unlocking the Mystery of the Dinosaurs and Their Extinction is a 1986 book written by Robert T. Bakker [1] [2] exploring extant evidence indicating that dinosaurs, rather than being cold-blooded and wholly lizard-like, were warm-blooded, agile creatures more similar to modern birds than to lizards or other reptiles.
With a mass of approximately 1.95 grams (0.069 oz) and a length of 5.5 centimetres (2.2 inches), the bee hummingbird (Mellisuga helenae) is the smallest known dinosaur as well as the smallest bird species, and the smallest warm-blooded vertebrate. Called the zunzuncito in its native habitat on Cuba, it is lighter than a Canadian or U.S. penny.