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In the 20th century they became an endangered species. They became endangered because they were poisoned by DDT pesticides. Peregrine's populations were in steep decline in the 20th century. People used DDT for their crops so their crops don't get any bugs. They stopped using DDT so the Peregrine Falcon was taken off the endangered species list.

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They feed on shore ducks and birds. They fly very fast and very high. Large prey gets knocked out of the air. They make a strike out of the air and catch their prey. They have a very poor strike.

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Adults have gray and blue wings and a buff colored underside with brown spots. For catching prey they have sharp hooked beaks and strong talons. They have white faces and their wingspan is 3.3 to 3.6 feet. The live up to 17 years and they are 14 to 19 inches tall. Most importantly they are the fastest animal on earth.

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This is the life cycle of a Peregrine falcon. First comes the egg that the mother is nesting on a hilltop. Next the chick forms inside the egg which is called incubation. The eggs hatch and after they hatch the female joins hunting with the male. When the chick's fur is replaced with feathers they learn to fly. Their first flight is 39 to 49 days. The chicks will be full grown in 6 weeks.

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They prey on other big birds and bats and they are predators. They can dive up to 200 miles an hour to catch prey. They even prey on great blue herons. Their predator was the great horned owl. They also catch ducks other birds and pigeons.

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Peregrine falcons live and can be found in any continent around the world except Antarctica. They also live on cliffs and on tall buildings. They prefer wide open spaces. They can be found from tundra to desert. They can even be found on big bridges.