Ingo Arndt / Double-crested cormorant (Phalacrocorax auritus) adult resting, close up portrait, Everglades National Park, Florida, USA. January. Finalist in the Birds Category of the GDT Awards 2015.

Juan Carlos Munoz / Double-crested Cormorants (Phalacrocorax auritus) and Brown pelicans (Pelecanus occidentalis) on small island, Isla Contoy National Park, Quintana Roo, Yuccatan Penninsula, Mexico

Juan Carlos Munoz / Double Breasted Cormorant (Phalacrocorax auritus) resting beak in plumage. Everglades National Park, Florida, USA, February.

Eric Baccega / Double crested cormorant (Phalacrocorax auritus) swimming on water at sunset, Cap Breton Highlands National Park, Nova Scotia, Canada, September

Tim Fitzharris / Double-crested Cormorant (Phalacrocorax auritus) drying its wings, North America

John Chan / California brown pelicans (Pelecanus occidentalis) preening, with Double-crested cormorants (Phalacrocorax auritus) roosting nearby, Southern California, USA, June.

John Chan / Flock of California brown pelicans (Pelecanus occidentalis) and Double-crested cormorants (Phalacrocorax auritus) taking off, Southern California, USA, June.

George Sanker / Double-crested cormorant (Phalacrocorax auritus) feeding on Catfish (Siluriformes). Myakka River State Park, Florida, USA. February.

Nick Hawkins / Doube-crested cormorants (Phalacrocorax auritus) roosting on the Bird Islands off Cape Dauphin, Nova Scotia, Canada. July.

Claudio Contreras / Brown Pelican (Pelecanus occidentalis) and Double-crested Cormorant (Phalacrocorax auritus), Guerrero Negro, El Vizcaino Biosphere Reserve, Baja California, Mexico, March

Claudio Contreras / Double-crested cormorant (Phalacrocorax auritus) flying, Magdalena Bay, Baja California, Mexico, February

Ingo Arndt / Double-crested Cormorant (Phalacrocorax auritus) adult, close up from feathers on back, Everglades National Park, Florida, USA, January.