The Attacks of the Goths on the Roman Empire. It is ironic that the most serious threats to the Roman Empire began not with the western Germanic tribes of the Roman frontier but the eastern Germanic tribes, particularly the Goths.
In a large, shallow body of water, hundreds of flamingos congregate like an avian water ballet team: all preening their pink feathers, resting in the sun and standing on one leg for hours at a time. Flamingos even sleep that way. Bird Image Gallery.
Ducks, geese, and swans all have webbed feet. The primary use for webbed feet is paddling through water. Here's how it works: as the bird pulls its foot backwards through the water, the toes spread apart, causing the webs to spread out. The webs push more water than just a bird foot with spread-out toes would push. (It would be like trying to swim with your fingers spread apart.) The webbed feet propel the bird through the water. When the bird pulls its foot forward for the next push, the toes come together, folding up the webs.