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Over 100 million birds die annually by crashing into glass windows in the United States. Kiwis are the only known bird to have nostrils located at the tip of their beak. In the United States birds and planes collided more than 22,000 times between the years of 1990 and 1998. In the Middle Ages, peacocks and swans were sometimes served at Christmas dinners. In order to scare away predators, Giant petrels, a type of seabird, throw up all over the intruder. The Arctic Tern, which is a small bird, can fly a round trip from the Arctic to the Antarctic and back. This can be as long as twenty thousand miles per year. This is the longest migration for a bird. The American Kestrel hawk weighs only four ounces. Storks were a symbol of fertility in Europe and were considered to bring good luck. Some birds have been know to put ants into their feathers because the ants squirt formic acid, which kills parasites. Pigeons can see ultraviolet lights. In 1681, the last dodo bird died. Flamingos are able to fly at a speed of approximately 55 kilometers an hour. In one night they can travel about 600 km. Blue Jays can imitate the calls of hawks. Birds do not sweat, as they do not have sweat glands. A seagull can drink salt water because it has special glands that filter out the salt. |