[["Bullfrogs sleep never more than 30 minutes so as to keep their own body weight from crushing their internal organs.", 220.0], ["It's not quite true that bullfrogs don't sleep. They don't sleep deeply, as we do, because they'd be eaten by predators.  But they \u201crest\u201d throughout the day, but these brief dalliances with a nap never quite reach an inattentive state. And in the winter they hibernate, hidden and deeply asleep", 5.0]]
why don't bullfrogs sleep
animals,frogs