the leg bones of a bat are so thin that bats cannot stand
Thin slices of veal cut from the leg are called cutlets, scallops, or scaloppini.
In England we call it 'cocking' their leg.
A tortoise leg
Hind leg, flank, back leg, or rear leg.
Thin oil zone below a gas cap
you call it a leg that has been hurt not severely but maybe damaged somehow
Those pink birds are called flamingoes. The standing on one leg thing is not restricted to them, however - herons, cranes and many other water birds do it.
If we're talking neon pink, dark colored or neutral colors work the best for contrast.