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2 datasets found

Tags: relative abundance

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  • North American Breeding Bird Survey Routes

    The North American Breeding Bird Survey (BBS), which is coordinated by the Biological Resources Division and Canadian Wildlife Service, is a primary source of population trend...

  • Breeding Bird Survey - Starting points

    The North American Breeding Bird Survey (BBS), which is coordinated by the Biological Resources Division and Canadian Wildlife Service, is a primary source of population trend...
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