Many kinds of bird regularly forage for prey underwater. These birds have a variety of ways of doing so and adaptations to match. Life in the water is very different from life in the air. The first ...

Cormorants are long-necked, long-billed diving birds. They swim underwater like fish, fly in a V like geese, roost like chickens and paddle around in the water like loons. In short, they are weird.

1. For birds, mammals and turtles, costs of swimming by foot propulsion are usually much higher than for propulsion by wings or foreflippers. The propulsive efficiency with which limbs impart thrust ...