Pied-billed Grebe

The Pied-billed Grebe is the most widespread grebe in North America and uniquely equipped with a large, heavy bill it uses to crush hard-shelled crayfish. Rather than fleeing by flying when alarmed, it sinks slowly beneath the surface like a submarine by expelling air from its plumage and body. It eats its own feathers and feeds them to its young — believed to help form pellets around fish bones.