Assertion: crane's population | /r/CapableOf | number only 60 birds
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text: In 1976, with the wild population numbering only 60 birds and having increased at an average of only one bird per year over the past decades, ornithologist George W. Archibald, co-founder of the International Crane Foundation in Baraboo, Wisconsin, began working with 'Tex', a female whooping crane hatched at the San Antonio Zoo in 1967 to Crip and his new mate, the wild-captured 'Rosie', to get her to lay a fertile egg through artificial insemination.