Frogs really should have fantastically strong leg muscles to jump as far as they do. And yet their leg muscles are only a fraction as powerful as they would need to be...so where does this leaping power really come from?
Dinosaurs ruled Earth for 160 million years, but they didn't get that way by running everywhere. What little we can tell about dinosaur anatomy suggests they could barely run at all. But they could power walk...thanks to their muscular rumps.
Here's a nice counterbalance for our previous report on Carnotaurus's wimpy arms - it turns out any shortcomings in its arms were more than made up for with its super-strong tail, which made it one of the fastest hunters around.
Bat mouths are already pretty much completely awesome, thanks to their amazing echolocation abilities. So this almost seems like overkill: bats are the first known mammals to possess superfast muscles, moving a hundred times faster than the average human muscle.
Migrating thousands of miles every year requires insane amounts of energy. But that's still nothing compared to the amount of water birds need to remain hydrated... and the drastic steps birds take to find all that water.