According to bird experts Kenn and Kimberly Kaufman, much about bird flying is dependent on the species, season, and what else the bird is doing. Songbirds that feed on insects vary in the elevation ...

Swifts practically live in the sky. These birds skip land for nearly a year, doing everything midair, from eating to sleeping. They travel thousands of miles without ever stopping to perch. Scientists ...

Pelicans are strong fliers and calm swimmers. They float on water and scoop fish into their large throat pouch while swimming ...

Some birds stay aloft for astonishing lengths of time, using clever sleep habits to survive long flights. These remarkable species show how migration can push creatures to extraordinary limits.