They are gay!
Most seabirds spend most of their time in the air, except when nesting.
they live on air because then they can see their predators around
Enormous animals have enormous lungs which can hold enormous amounts of air for an enormously long time.
The wings of a bird help the bird float on air currents. That's why a bird doesn't have to flap the whole time. It can float or soar.
fish need air because they won't be able to breath if they didn't have air, and fish need air badly because they spend most time in the water. fish need air as much as we do.
Perigrine falcons spend most of their time in the air as do most birds, so they don't "walk" they hop, and they probably don't do it very fast.
Except for a few seconds when leaping into the air, whales spend ALL of their time in the water. They cannot move on land.
Air+Lizard= Bird
a couple hours, you will likely spend more time on the tarmac than in the air
Hippopotamuses sleep in the water, where they spend most of their time. Every few minutes they will automatically push their nostrils above water, where the nostrils open and take in air.
Yes, an adult wasp will spend most of its life farting, this is how it remains in the air.
The hardest one, spend some time upside down while in the air