Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Paul Williams / Brasilian cormorants (Phalacrocorax brasilianus) and Great egrets (Ardea alba) in night roost in tree, Pantanal, Pocone, Brazil

Daniel Heuclin / Neotropic / Vigua / Brasilian cormoran (Phalacrocorax brasilianus) perched on branch over river, River Yapacani, Bolivian Amazonia.

Luiz Claudio Marigo / Brazilian Cormorant (Phalacrocorax brasilianus) drying its wings by the Pixaim River. The Pantanal wetlands of Mato Grosso State, Brazil, November.

DAVID TIPLING / Cormorant {Phalacrocoraciae} threatening female Eider duck {Somateria mollissima} Northumberland, UK.