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How many African gray parrots were estimated to have been sold internationally between 1982 and 2001?

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According to a 2003 study by the United Nations Environment Programme, it is estimated that nearly 660,000 African gray parrots were sold on the international market between 1982 and 2001.1

Additionally, it is estimated that more than 300,000 birds likely died during the process of capture or transport during that same period.1