IV North American Ornithological Conference

Posted November 11, 2017

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MacDonald, R, W, Bar Harbor, United States, adkrich@prexar.com
Wells, J, V, Boreal Songbird Initiative, Hallowell, United States , jeffwells@borealbirds.org
Blancher, P, J, Canadian Wildlife Service, Ottawa, Canada, Peter.blancher@ec.gc.ca
Bevier, L, R, Colby College, Waterville, United States, lrbevier @ colby.edu

REPRESENTATION OF BOREAL BIRDS IN NEOTROPICAL BIRD COMMUNITIES

An estimated 3-5 billion birds migrate south from the Boreal ecoregions of Alaska and Canada every fall to winter across the Americas . Many of these Boreal breeding birds become integrated into Neotropical bird communities in Central and South America and the Caribbean but their significance and ecological roles are only beginning to be understood. We used existing datasets on distribution and relative abundance to explore both the biogeography of wintering Boreal migrants and their occurrence and realtive abundance with wintering bird communities. We will report on: 1) the proportion of wintering populations of Boreal migrants estimated to occur within countries and ecological regions of the Neotropics; 2) comparative diversity and abundance of Boreal migrants across countries and ecoreions of the Neotropics; 3) occurrence, relative abundance, and diversity within local Neotropical bird communities and; REPRESENTATION OF BOREAL BIRDS IN NEOTROPICAL BIRD COMMUNITIES A survey of the ecological roles of wintering Boreal migrants

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      MacDonald, R, W, Bar Harbor, adkrich@prexar.com
      Wells, J, V, Boreal Songbird Initiative, Hallowell, United States, jeffwells@borealbirds.org
      Blancher, P, J, Canadian Wildlife Service, Ottawa, Canada, Peter.blancher@ec .gc.ca
      Bevier, L, R, Colby College, Waterville, United States, lrbevier@colby.edu

      REPRESENTATION OF BOREAL BIRDS IN NEOTROPICAL BIRD COMMUNITIES

      Around 3 to 5 billion birds migrate south from the boreal ecoregions of Alaska and Canada every fall-winter across America. Many of these birds are integrated into communities of Neotropical birds in Central and South America and the Caribbean, but the ecological role and its meaning are only beginning to be understood. We used existing data sets on distribution and relative abundance to explore the biogeography of wintering boreal migratory birds and their relative presence and abundance with wintering bird communities. We will provide information on: (1) the proportion of wintering populations of boreal migratory birds estimated to occur in the Neotropical countries and ecological regions; 2) abundance and comparative diversity of boreal migratory birds throughout the countries and ecoregions of the Neotropics; 3) presence, relative abundance and diversity among local Neotropical bird communities, and; (4) a study of the ecological roles of boreal migratory birds.