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Number of American Birds on Decline

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• This undated photo provided by the National Audubon Society shows the boreal chickadee. In 1967, there were 19.5 million boreal chickadee in America, but now there are only 5.2 million, according to a new study by The National Audubon Society.
• This undated photo provided by the National Audubon Society shows a common tern. An iconic symbol of conservation in the early 20th Century, the common tern, is doing well in managed areas, but elsewhere its numbers are plummeting, according to a new study by The National Audubon Society.
• This undated photo provided by the National Audubon Society shows the eastern meadowlark. The population of Eastern meadowlarks has fallen from 24 million in 1967 to 7 million now, and its cousin the Western meadowlark isn't doing well either, according to a new study by The National Audubon Society.
• This undated photo provided by the U.S. Fish and Wildlife Service shows the greater scaup. The population of the greater scaup is only one quarter of what it was in 1967, the fourth biggest decline in common bird populations in North America, according to new study by The National Audubon Society.
• This undated photo provided by the National Audubon Society shows the northern pintail. The northern pintail, a duck, ranks third in population decreases among common American birds. Its population has dropped 77 percent since 1967, according to a new study by The National Audubon Society.
• This undated photo provided by the U.S. Fish and Wildlife Service shows the evening grosbeak. The number of evening grosbeak, once common around bird feeders, have fallen by 78 percent since 1967, the second biggest drop in common bird populations in North America according to a new study by The National Audubon Society.
• This undated photo provided by the National Audubon Society shows the Northern bobwhite. The northern bobwhite has seen the biggest drop in population among common birds in North America since 1967. The bobwhite's numbers have dropped from 31 million in 1967 to 5.5 million now, according to The National Audubon Society.