The chicken is the closest living relative to the Tyrannosaurus Rex.
Many birds kept as pets, including doves, parakeets, and lovebirds, enjoy living in pairs for companionship.
The smallest bird egg belongs to the hummingbird and is the size of a pea. The largest bird egg, from which the ostrich hatches, is the size of a cantaloupe.
A bird’s eye takes up about 50 percent of its head; our eyes take up about 5 percent of our head. To be comparable to a bird’s eyes, our eyes would have to be the size of baseballs.
The penguin is the only bird that can swim, but not fly. It is also the only bird that walks upright.
Owls turn their heads almost 360○ (a complete circle) but they cannot move their eyes. Read more