swallows
Because of their wings and the wind speed outside.
The Wandering Albatross; it can say in the air for years.
The purpose of the air sacs in a bird is to help digest food into the gizzard, and to help it breathe, and stay in the air longer and more smoothly. Hope this helps!
8 years.
Air+Lizard= Bird
An Experiment on a Bird in the Air Pump was created in 1768.
15 psi
The Cosby Show aired for eight seasons, from 1984 to 1992.
Albatross, The only time they land is to look after there young, until they're old enough to fly
air+egg=bird
Egg + air = bird