![]() ![]() “We can all talk through the stories about there being fewer and fewer birds, but it’s not until you really put the numbers on it that you can really grasp the magnitude of these results,” Marra said. and Canada has fallen from just over 10 billion to a little more than 7 billion in the last 50 years, the research showed. ![]() ![]() The population of birds at the start of breeding season in the U.S. Pete Marra is an ecologist and the director of Georgetown University’s environment initiative in Washington, D.C. The total bird population in the two countries has fallen by almost 3 billion, with grassland birds such as western meadowlarks and American sparrows and shorebirds such as green herons taking the biggest hits. and Canada have lost more than 1 in 4 birds. The results were staggering: Since 1970, the continental U.S. 19 in the journal Science, Marra joined with other scientists and conservationists to analyze nearly five decades of population data on 529 species of North American birds. But he said they didn’t understand the scale of the crisis - until now.įor a study published Sep. Scientists like Marra have long known that birds were in trouble, having watched their favorite species fade from view. “It's an empty feeling in your stomach that these same birds that you grew up with just aren't there anymore.” They're rare in many places,” said Marra, now an ecologist who is the director of the Georgetown Environment Initiative. ![]()
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