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ComprehensiveResults! North American Breeding Bird Survey The Challenge: Like the canary in the coal mine, wild birds have long been recognized as bellwethers for environmental health. By monitoring populati
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Document Date: 2015-01-16 07:58:00
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ComprehensiveResults! North American Breeding Bird Survey The Challenge: Like the canary in the coal mine, wild birds have long been recognized as bellwethers for environmental health. By monitoring populati