owl are and some herons are partially nocturnal
since they have feathers they are placed under kingdom animalia - aves
They aren't. They have large brains (for a bird), and they're pretty smart (for a bird), but the real geniuses of the bird world are probably crows. Parrots are good mimics (again, partly due to the...
The king penguin can dive deeper than the emperor penguin!:)
Pacific Ocean
Pretty much all birds, its a sign of affection.