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Vetstreet: 20 Animals You Might Not Know Are Going Extinct

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The hawk is one of the most common birds found in North America, so it is shocking that any of its subspecies would be in danger of extinction. However, one subspecies, the Puerto Rican Broad-Winged hawk, is listed as endangered wherever it is found. Their numbers in their native habitat have been estimated as few as 100 birds.

(Credit: Thinkstock)

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