9 Extremely Rare Species of Ectotherms

North American pets often include corn snakes. Non-venomous and docile. Burrowing snakes. Tree-climbing adults exist. 75 to 82 F in temperate environments, 80 to 85 F in hot.

Corn Snakes

Venomous rattlesnakes have segmented tail rattles. Rattlesnakes sunbathe or relax in the shade to cool down. Rattlesnakes hibernate in dens or burrows.


The only continent without turtles is Antarctica. These animals inhabit land, saltwater, and freshwater. Their shells are part of their body and their limbs can retract or be altered for swimming.


They sunbathe to warm up during the day. They must sunbathe before diving for algae because the water can drop their body temperature. At night, they pile up to keep warm.

Marine Iguana 

Crocodiles resemble alligators. Males are 15 feet tall. Alligators enjoy 82-92 F when active. Warming up, they sunbathe. Wintertime, they burrow in dirt or stay underwater.

American Alligators

Goldfish prefer tank temperatures between 68 and 74 F. Anything above 80°F can stress them out. These fish can withstand near-freezing water in the wild.


Toads aren't frogs. Eyecrests, warts, and toxin-secreting parotoid glands. Evaporation cools them. Certain toads brumate below 75°F.


Lobsters are marine-dwelling crustaceans. The waterways they inhabit affect their body temperatures. Depending on the species, they live in different oceans.


Tropical crabs prefer temperatures over 75°F. They're active at night when the sun won't burn them. Hermit crabs slumber and hide in their shells.

Hermit Crabs 

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