Across the animal kingdom, a surprising number of species defy the simple warm-blooded or cold-blooded labels found in textbooks. From leatherback sea turtles that can keep their deep body temperature ...

A tiger walks the same worn groove along the edge of its exhibit like a broken record. A parrot methodically plucks out its own feathers until bare skin shows through. To a casual visitor, these can ...

Animal behavior is the scientific study of the observable actions, interactions, and behavioral patterns of animals, typically investigated within ethology, behavioral ecology, and comparative ...