Applied to birds which can not fly, because of their short wings; such as, the ostrich, cassowary, and emu.

The cassowary is a large black, flightless bird, with colorful wattles and a large bony head shield, that resembles an ostrich or emu. It is native to northeastern Australia and New Guinea.

Wattles refer to the fleshy wrinkled and often brightly colored fold of skin hanging from the neck, chin, or throat, of certain birds (chickens and turkeys) or lizards.