Zoos hiding birds as avian flu spreads in Canada and United States - The Globe and Mail

With nearly 23 million chickens and turkeys have already been killed across the U.S. to limit the spread of the avian flu, Toronto Zoo workers are adding roofs to some outdoor bird exhibits

A sign is displayed instructing visitors of a closed bird exhibit at the Blank Park Zoo, in Des Moines, Iowa, on April 5.Charlie Neibergall/The Associated Press Zoos across North America are moving … [+4532 chars]

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