Ingo Arndt / Pelagic cormorant (Phalacrocorax pelagicus) flying, Bering Sea, Alaska, USA

Gerrit Vyn / Mixed group of Pelagic cormorant (Phalacrocorax pelagicus) and Brandt's cormorant (Phalacrocorax penicillatus) resting on a log near a pulp mill in Tacoma, Washington, USA, January.

Chien Lee / Pelagic Cormorant (Phalacrocorax pelagicus) on nest, California

Chien Lee / Pelagic Cormorant (Phalacrocorax pelagicus), California

Glenn Bartley / Pelagic Cormorant (Phalacrocorax pelagicus), British Columbia, Canada

Eric Baccega / Pelagic cormorant (Phalacrocorax pelagicus) in flight, British Columbia, Canada, June.

Sergey Gorshkov / Pelagic Cormorant (Phalacrocorax pelagicus) at nest with chicks, Wrangel Island, Russia

Suzi Eszterhas / Pelagic Cormorant (Phalacrocorax pelagicus), Monterey Bay, California

Gerrit Vyn / Pelagic Cormorant (Phalacrocorax pelagicus) on nest, St. Lazaria Island, Alaska, USA, June.

Ingo Arndt / Pelagic Cormorant (Phalacrocorax pelagicus), Bristol Bay, Round Island, Alaska

Juergen & Christine Sohns / Pelagic Cormorant (Phalacrocorax pelagicus) group, Monterey, California

Suzi Eszterhas / Pelagic Cormorant (Phalacrocorax pelagicus), Monterey Bay, California

Konstantin Mikhailov / Brand's Cormorants (Phalacrocorax penicillatus)adults and juvenile birds, alongside juvenile Double-crested coromorants (Phalacrocorax auritus) and juvenile Pelargic cormorants (Phalacrocorax pelagicu...

Joel Sartore / Photo Ark / Southern pelagic cormorant (Urile pelagicus resplendens) juvenile, head portrait, International Bird Rescue Center, California, USA. Captive.

Jenny E. Ross / Seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as...

Jenny E. Ross / Ecotourists view a seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia ar...

Jenny E. Ross / Seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) flies from the water after catching a tiny fish, in the Bering Sea near Medny Island in the Commander Islands, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) with large chicks on a cliffside nest at a huge seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) with large chicks on a cliffside nest at a huge seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) with large chicks on a cliffside nest at a huge seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) pair with large chicks on a cliffside nest at a huge seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) on cliffside nest at a huge seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Pelagic cormorant (Phalacrocorax pelagicus) near Common guillemots (Uria aalge inornata) on its nest with chicks, Kolyuchin Island, Chukotka, in the Chukchi Sea, Siberia, Russia.