Pete Oxford / Male Galapagos Flightless cormorant offering seaweed to female {Nannopterum harrisi}

David Tipling / Flock of Knot (Calidris canutus) chased by a Peregrine as they arrive to roost at high tide, Cormorants in foreground, Snettisham RSPB Reserve, The Wash, Norfolk, September.

David Hall / Split-level of Cormorants (Phalacrocorax sp.) standing on rocks with Sea lettuce (Ulva sp.) seen underwater, Hussar Bay, Nigei Island, Queen Charlotte Strait, British Columbia, Canada. September.

Marie Read / Abstract patterns of reflected sky and clouds on the ocean with a silhouetted Red-faced cormorant (Phalarocorax urile) in flight, St. Paul Island, Pribilof Islands, Alaska, USA, July.

Tui De Roy / Flightless cormorant (Phalacrocorax harrisi), two on rock. Bird drying wings in foreground with other sitting on nest in background. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Flightless cormorant (Phalacrocorax harrisi), Punta Espinosa, Fernandina Island, Galapagos

Guy Edwardes / Reed cormorant (Microcarbo africanus) perched on termite mound, Khwai, Botswana.

Tui De Roy / Flightless cormorant (Phalacrocorax harrisi) silhouetted, Punta Espinosa, Fernandina Island, Galapagos

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus) beneath an oil rig. Eureka Rig, Los Angeles, California, USA, September

Markus Varesvuo / Cormorant (Phalacrocorax carbo) swallowing perch prey, Hungary, January

Jack Dykinga / Wrecked ship with cormorant colony, on Namibia's skeleton coast, Dorob National Park, Namibia. July 2013.

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus), beneath an oil rig. Eureka Rig, Los Angeles, California, United States of Ame...

Bence Mate / Cormorant (Phalacrocorax carbo) and Great egret (Ardea alba) fighting over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, January.

Bence Mate / Great egret (Ardea alba) fighting with Cormorant (Phalacrocorax carbo) over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Cormorants (Phalacrocorax carbo) squabbling over fish, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Two Cormorants (Phalacrocorax carbo) squabbling, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Cormorants (Phalacrocorax carbo) squabbling over fish, Pusztaszer, Kiskunsagi National Park, Hungary, November.

Bence Mate / Three Pygmy cormorants (Microcarbo pygmeus) drying themselves, one by shaking off water, Hortobagy National Park, Hungary

Bence Mate / Cormorant (Phalacrocorax carbo) with fish prey, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. March.

Bence Mate / Cormorants (Phalacrocorax carbo) fighting, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Erlend Haarberg / European shag (Phalacrocorax aristotelis) sitting at the entrance of a cave with flock of Common guillemots (Uria aalge) and Gulls (Laridae) flying past cave, Hornoya and Reinoya Nature Reserve, Finnm...

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.

Andy Rouse / Galapagos flightless cormorant (Phalacrocorax harrisi) diving for fish underwater, Galapagos.

Espen Bergersen / Atlantic puffin (Fratercula arctica) and European shag (Phalacrocorax aristotelis) Hornoya, Finnmark, Norway. March.

Espen Bergersen / European shags (Phalacrocorax aristotelis) in courtship display. Hornoya bird cliff, Finnmark, Norway. March.

Tui De Roy / Flightless cormorant (Phalacrocorax harrisi) underwater, Punta Vicente Roca, Isabela Island, Galapagos, Ecuador, April.

David Pattyn / Shag (Phalacrocorax aristotelis) flying with nesting material, Hornoya, Varanger, Finnmark, Norway, May.

David Pattyn / Shag (Phalacrocorax aristotelis) spreading wings to dry, Hornoya, Varanger, Finnmark, Norway, April.

Bence Mate / Pygmy cormorants (Phalacrocorax pygmaeus) drying their feathers, Hortobay, hungary, August.

Ben Hall / Cormorant (Phalacrocorax carbo) with perch in its beak, Cheshire, UK, October. Highly Commended in the British Wildlife Photography Awards (BWPA) competition 2013.

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

Markus Varesvuo / Common shag (Phalacrocorax aristotelis) flying, with the sun in the background, Vardo, Norway, March.

Markus Varesvuo / Flock of Common shags (Phalacrocorax arostotelis) resting on a cliff, with wind blown snow, Vardo, Norway, March.

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

Eric Baccega / Common cormorant (Phalacrocorax carbo) catching a european eel (Anguilla anguilla), captive, Alsace, France.

Tui De Roy / Flightless Cormorant (Nannopterum / Phalacrocorax harrisi) with nesting material. Banks Bay, Isabela Island, Galapagos Islands, Ecuador, December.

Tui De Roy / Flightless Cormorant (Nannopterum / Phalacrocorax harrisi) with chick at nest, made from dead starfish. Banks Bay, Isabela Island, Galapagos Islands, Ecuador, December.

Terry Whittaker / 2020VISION / Two Common comorants (Phalocrocorax carbo) perched on statue drying out, Bushy Park, London, England, UK, November.

Florian Möllers / Chinese Fisherman and one of his Great Cormorants (Phalacrocorax carbo sinensis). Li River, Yangshuo, Guangxi, China, November.

Florian Möllers / Chinese fisherman on his raft with Great Cormorant (Phalacrocorax carbo sinensis), silhouetted against the karst hills at the Li River. Yangshuo, Guangxi, China, November.

Florian Möllers / Chinese fisherman on his raft with Great Cormorant (Phalacrocorax carbo sinensis) fishing at night on the Li River. Yangshuo, Guangxi, China, November.

Florian Möllers / Chinese fisherman on his raft with Great Cormorants (Phalacrocorax carbo sinensis) fishing at night on the Li River. Yangshuo, Guangxi, China, November.

Florian Möllers / Fisherman holding Great Cormorant (Phalacrocorax carbo sinensis) with large fish in its beak. Li River, Yangshuo, Guangxi, China, November.

Florian Möllers / Chinese Fisherman on his raft with Great Cormorant (Phalacrocorax carbo sinensis), against the karst hills at the Li River. Yangshuo, Guangxi, China, November.