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No. 7: African Grey Parrot

In December 2016, the International Union of Concerned Naturalists revealed that 11 percent of newly discovered bird species were already threatened and changed the status of others, such as the African Grey Parrot, from “vulnerable” to “endangered.” Highly intelligent and capable of mimicking human speech, the African Grey Parrot’s population has shrunk by as much as 99 percent in some places because of habitat loss and trapping. Perhaps the most famous member of this species was Alex, the subject of intelligence studies at Harvard and Brandeis universities who, when he died in 2007, knew more than 100 English words.

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