SCOTLAND: The Big Picture / Grey heron (Ardea cinerea) hunting for food amongst moss with loch and Celtic rainforest in back ground, Scotland, UK, October..

Terry Whittaker / Grey heron ( Ardea cinerea) flying to bin. Herons congregate around the fish stalls as city markets are closing, picking up scraps of food. Amsterdam, Netherlands. April.

Terry Whittaker / Grey heron ( Ardea cinerea) flying at night, Amsterdam, Netherlands. April.

Terry Whittaker / Grey Heron ( Ardea cinerea) flying in city, Amsterdam, Netherlands. April.

Terry Whittaker / Grey Heron ( Ardea cinerea). Amsterdam, Netherlands. April 2017

David Perpinan / Grey heron (Ardea cinerea) chick trying to force its parent to regurgitate food, Barcelona, Spain, May.

David Perpinan / Grey heron (Ardea cinerea) chick trying to force its parent to regurgitate food, with another chick leaning in, chased away by adult, Barcelona, Spain, May.

David Perpinan / Grey heron (Ardea cinerea) regurgitating a fish for its chick, Barcelona, Spain, May.

Klein & Hubert / Grey heron (Ardea cinerea) catching a fish, France

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) catching fish in lake, Pusztaszer, Hungary, April

Michel Poinsignon / Grey heron (Ardea cinerea) landing on lake, Pusztaszer, Hungary, April

Bence Mate / Grey heron (Ardea cinerea) close up of feathers, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, February.

Bence Mate / Grey heron (Ardea cinerea) close up of neck and eye, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, February.

Bence Mate / Grey heron (Ardea cinerea) close up with fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary, February.

Bence Mate / Grey heron (Ardea cinerea) two fighting in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Grey Heron (Ardea cinerea) with large carp fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Grey herons (Ardea cinerea) fighting in water, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey herons (Ardea cinerea) fighting in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Group of Great egrets (Ardea alba), Grey heron (Ardea cinerea) and Eurasian spoonbill (Platalea leucorodia) at night with stars and moon. Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. May.

Bence Mate / Grey heron (Ardea cinerea) in rain with another heron behind, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey heron (Ardea cinerea) face to face in lake, at night with stars, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. July.

Bence Mate / Grey heron (Ardea cinerea) with fish prey, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. May.

Bence Mate / Grey herons (Ardea cinerea) fighting, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. June.

Bence Mate / Great white egret (Ardea alba) fighting with Grey heron (Ardea cinerea) squabbling, Lake Csaj, Kiskunsagi National Park, Hungary, January.

Bence Mate / Black crowned night heron (Nycticorax nycticorax) at twilight with other herons in the background, including Grey heron (Ardea cinerea) in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hun...

Bence Mate / Great egrets (Ardea alba) in winter, and Grey heron (Ardea cinerea) with flock of other birds flying above, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Bence Mate / Grey herons (Ardea cinerea) fighting in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Grey herons (Ardea cinerea) two fighting, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Grey herons (Ardea cinerea) squabbling for fish in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey heron (Ardea cinerea) close up with large fish in beak, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Grey heron (Ardea cinerea) with lightning storm at night. Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. May 2012.

Bence Mate / Grey herons (Ardea cinerea) fighting, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey heron (Ardea cinerea) squabbling, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. February.

Bence Mate / Great egret (Ardea alba) and Grey heron (Ardea cinerea) squabbling, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. January.

Bence Mate / Grey heron (Ardea cinerea) and Great egret (Ardea alba) fighting over fish, Lake Csaj, Pusztaszer, Hungary, December. Winner of the Portfolio category of the Terre Sauvage Nature Images Awards competi...

Bence Mate / Two Great egrets (Ardea alba) standing opposite each other with Grey heron (Ardea cinerea) in between. Lake Csaj, Pusztaszer, Hungary, January. Winner of the Portfolio category of the Terre Sauvage Na...

Bence Mate / Great egrets (Ardea alba) and Grey heron (Ardea cinerea) squabbling over fish, with some in flight. Blurred motion photograph, Lake Csaj, Pusztaszer, Hungary. February.

Bence Mate / Little egret (Egretta garzetta) and Grey herons (Ardea cinerea) reflected in lake at twilight, Lake Csaj, Pusztaszer, Hungary. June. Winner of the Portfolio category of the Terre Sauvage Nature Images...

Bence Mate / Group of Great egrets (Ardea alba) reflected in still water, with Hooded crows (Corvus cornix), Lake Csaj, Pusztaszer, Hungary. Winner of the Portfolio category of the Terre Sauvage Nature Images Awar...

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Bence Mate / Grey herons (Ardea cinerea) standing in water a dawn, Puszaszer, Hungary, July.

Bence Mate / Grey heron (Ardea cinerea) catching fish, taken with remote camera, Pusztaszer, Hungary, June.

Eric Medard / Grey heron (Ardea cinerea) at night, taken with infra-red, Mayenne, Pays de la Loire, France, September.

Eric Medard / Grey heron (Ardea cinerea) in small stream at night, taken with infra-red remote camera trap, France. October.

Florian Möllers / Grey heron (Ardea cinerea) adult in breeding plumage, close-up of head and colourful orange beak, backlit, Berlin Zoological Garden, Berlin Zoo, Germany. February.

Staffan Widstrand,Staffan Widstrand / Spot-billed Pelican (Pelecanus philippinensis) Great white egret, (Casmerodius albus) Little egret (Egretta garzetta) Eurasian flamingo, (Phoenicopterus roseus) Spoonbill (Platalea leucrodia) reflecte...