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Phalacrocorax brasilianus  Neotropic Cormorant
(Previously known as Olivaceous Cormorant) These branch-nesting piscivores are fairly common breeding birds in the southwestern part of the Coastal Marsh Region, nesting in colonies with Roseate Spoonbills and herons.

photo Copyright 1999 by Bill Bergen 
female or male

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Phalacrocorax auritus  Double-crested Cormorant
This piscivorous species is common in the winter, is a late migrant, and breeds only rarely in Louisiana; therefore, birds seen in the spring are not necessarily breeding. The scatter of "Possible" records probably represents nonbreeding individuals

photo Copyright 1999 by Brian Miller 
immature male or female

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Phalacrocorax sp.  unidentified Neotropic or Double-crested Cormorant
These Atlas records represent either Neotropic or Double-crested cormorants whose identification was uncertain.

Neotropic (left inset) Copyright 1999 by Bill Bergen Double-crested (right inset) Copyright 1999 by Dan Lane 
male or female