Bird's Unit (TGTB)

the vical organ or voice bix of birds

the feathers of a bird

the organ that partially softens a birds food before digestion

the shape of a birds wing

the feathers found on the tail of a bird that allow it to steer in the air

a muscular pouch in a birds esophagus that temporarly stores food and sometimes produces milk

the feathers that create lift and sustain a bird in the air

the process of hatching eggs using the warmth of the body

a muscular organ that crushes a bird's food by shifting it around and grinding it against swallowed geit or stones

the class containing birds: endothermic, bioedal vertebrates that lay eggs and have a bill, wings, feathers, and lightweight skeletons