Oscar Dewhurst / Mute swan (Cygnus olor) swimming with cygnets in misty lake in morning light. Richmond Park, London, England, UK. May.

Jack Dykinga / Sandhill cranes (Antigone canadensis) and Snow geese (Chen caerulescens) at sunrise, Bosque del Apache National Wildlife Refuge, New Mexico, USA, November.

Jack Dykinga / Snow goose (Chen caerulescens) landing into a tight packed flock on lake, Bosque del Apache National Wildlife Refuge, New Mexico, USA. January.

John Waters / Slow motion clip of a mixed flock of Teal (Anas crecca) and Wigeon (Anas penelope) landing in a lake, Greylake RSPB Reserve, Somerset Levels, England, UK, February.

Andy Rouse / Mute swan (Cygnus olor) feeding at dawn, Cardiff, Wales, UK, March.

Andy Rouse / Pair of Great crested grebes (Podiceps cristatus) courting, Cardiff, Wales, UK, March.

Andy Rouse / Pair of Great crested grebes (Podiceps cristatus) courting, Cardiff, Wales, UK, March.

David Pattyn / Tufted duck (Aytha fuligula) female portrait.The Netherlands. April..

Jack Dykinga / Sandhill cranes (Grus canadensis) and Snow geese (Chen caerulescens) Bosque del Apache National Wildlife Refuge, New Mexico, USA, December.

Bence Mate / Graylag gosling (Anser anser) resting under parent's wing, Kiskunsagi National Park, Pusztaszer, Hungary.

Bence Mate / Graylag gosling (Anser anser) with parent, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. April.

Bence Mate / Flock of Mallard ducks (Anas platyrhynchos) taking off, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. December.

Wim van den Heever / Whooper swan (Cygnus cygnus) mid flight over the frozen lake, Kussharo, Hokkaido, Japan.

Wim van den Heever / Whooper swan (Cygnus cygnus) portrait, on frozen lake Kussharo, Hokkaido Japan, February.

Wim van den Heever / Whooper swans (Cygnus cygnus) juvenile with adults behind, on frozen Lake Kussharo, Hokkaido, Japan. February.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship weed dance, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship weed dance, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) in urban environment Cardiff, UK

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance at dawn, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) with young chicks on back, Cardiff, UK, April.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance at dawn, Cardiff, UK, March. Highly Commended in the Animal Behaviour Category of the BWPA Competition 2015.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) rival males fighting during mating season, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance Cardiff, UK, March.

Andy Rouse / Mute swan (Cygnus olor) with wings raised defensively at sunrise, Wales, UK, April.

Andy Rouse / Mute Swan (Cygnus olor) courtship behaviour, Wales, UK, April.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance, Cardiff, UK, March.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance, Cardiff, UK, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) carrying chick on back, The Netherlands, May.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in 'weed dance' courtship display, The Netherlands, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) two in territorial fight, The Netherlands, March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in 'weed dance' courtship display, The Netherlands. March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in courtship display, The Netherlands. March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in courtship display, The Netherlands. March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) with head low to the water in aggressive display, The Netherlands. March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) carrying chick while its mate approaches with food, Netherlands, May.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in courtship display, The Netherlands. March.

Krijn Trimbos / Great crested grebe (Podiceps cristatus) pair in courtship display, The Netherlands. March.

Danny Green / Whooper swans (Cygnus cygnus) two in flight, during snowfall, Lake Kussharo, Japan, February

Danny Green / Whooper swan (Cygnus cygnus) in flight in snowfall, Lake Kussharo, Japan, February

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...

Claudio Contreras / Aquatic plants (Typha sp.) with Mexico City buildings in the back, Xochimilco wetlands, Mexico City, January

Andy Rouse / Great crested grebe (Podiceps cristatus) on lake, Wales, UK, June.

David Pattyn / Great crested grebe (Podiceps cristatus) backlit adult bird at dawn. The Netherlands.May 2014

David Pattyn / Great crested grebe (Podiceps cristatus) close-up of an adult with two young chicks. The Netherlands. June 2014

David Pattyn / Shelduck (Tadorna tadorna) male trying to grab a female to mate with her. The Netherlands. April.

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their 'weed dance' in which they take a vertical position in front of each other and offer plant material to each other. The Netherlands. March...

David Pattyn / Mallard (Anas platyrhynchos) female. The Netherlands.April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) adult, The Netherlands.April 2014

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

David Pattyn / Great crested grebe (Podiceps cristatus) pair swimming fast and mimicking each other's head shaking during the courtship dance. The Netherlands. April.

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

David Pattyn / Mallard (Anas platyrhynchos) portrait while calling. The Netherlands. April..

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. Here the male is offering the female plant material. The Netherlands. April.

David Pattyn / Great crested grebe (Podiceps cristatus) adult with a young chick on the back and another chick in the water. The Netherlands.June 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) pair at night, performing their courtship dance during the mating season, with street lights reflected in the water. The Netherlands.April 2014

David Pattyn / Great crested grebe (Podiceps cristatus) close-up of an adult with two young chicks. The Netherlands. June 2014

David Pattyn / Great crested grebe (Podiceps cristatus) close-up of an adult with two young chicks. The Netherlands. June 2014

David Pattyn / Shelduck (Tadorna tadorna) portrait. The Netherlands. April.

David Pattyn / Mallard (Anas platyrhynchos) female and young. The Netherlands. May 2014

David Pattyn / Egyptian goose (Alopochen aegyptiacus) portrait. The Netherlands. June 2014

David Pattyn / Canada goose (Branta canadensis) group of adults with young chicks. The Netherlands. June 2014

David Pattyn / Great crested grebe (Podiceps cristatus) courting pair. The Netherlands.May 2014

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

David Pattyn / Tufted duck (Aytha fuligula) portrait of a male in breeding plumage. The Netherlands. April..

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

David Pattyn / Canada goose swimming portrait (Branta canadensis) The Netherlands. March 2013.

David Pattyn / Great crested grebe (Podiceps cristatus) adult running over the water surface during the courtship. The Netherlands. April 2014.Second place in the Species Story category of the Terre Sauvage Nature I...

David Pattyn / Black necked grebe (Podiceps nigricollis) adult foraging at night and catching mosquitoes. The Netherlands.March 2014. Highly commended in Asferico Awards 2017

David Pattyn / Black necked grebe (Podiceps nigricollis) adult in breeding plumage photographed at night with the reflection of street lights in the water. The Netherlands. March 2014. Winner of the Telephoto catego...

David Pattyn / Great crested grebe (Podiceps cristatus) courting pair. The Netherlands.May 2014

David Pattyn / Great crested grebe (Podiceps cristatus) pair performing their courtship dance in which they mimic each other's movements. The Netherlands. April.

Markus Varesvuo / Red-throated Diver (Gavia stellata) portrait at edge of lake, Vaala, Finland, June

Terry Whittaker / Two Red-throated divers (Gavia stellata) on a lake, vocalising, Iceland, July.

Yva Momatiuk & John Eastcott / Snow Goose (Chen caerulescens) flock taking flight from pond, Bosque del Apache National Wildlife Refuge, New Mexico

Denis-Huot,Denis-Huot / Lesser flamingo (Phoeniconaias minor) aerial view of flock and geyser, Bogoria Game Reserve, Kenya

Denis-Huot,Denis-Huot / Lesser flamingo (Phoeniconaias minor) males in display, Lake Nakuru, Kenya

Konrad Wothe / Aggressive Mute swan (Cygnus olor) Upper Bavaria, Germany, Europe

Laurent Geslin / Tufted Duck (Aythya fuligula) flock overwintering on Lake Leman / Geneva with city in background, Switzerland

Laurent Geslin / Mute Swan (Cygnus olor) feeding on Lake Leman / Geneva, Switzerland

Laurent Geslin / Mute Swans (Cygnus olor) on shore of Lake Leman / Geneva at night, Switzerland

Laurent Geslin / Mute Swan (Cygnus olor) with cygnet, Lake Leman / Geneva, Switzerland

Laurent Geslin / Goosander (Mergus merganser) female on Lake Geneva, near Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) with chick flapping its wings. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Mute swan (Cygnus olor) inquisitive juvenile on Lake Geneva, Geneva, Switzerland

Laurent Geslin / Coot (Fulica atra) landing on Lake Geneva, Geneva, Switzerland

Laurent Geslin / Red breasted merganser (Mergus serrator) male on Lake Geneva, near Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding their chicks, which are carried on their backs. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Red breasted merganser (Mergus serrator) male grooming, on Lake Geneva, near Geneva, Switzerland

Laurent Geslin / Goosander (Mergus merganser) female on Lake Geneva, near Geneva, Switzerland

Jussi Murtosaari / Whooper Swans (Cygnus cygnus) on a frozen lake, Finland, January

Ben Hall / Mute swan (Cygnus olor) stretching its wings backlit at dawn, Poynton, Cheshire, UK, December. Highly honoured in the Bird Category of the Windland Awards of Natures Best Photography Competition 2016...

Ben Hall,Ben Hall / Great crested grebes (Podiceps cristatus) pair performing courtship displaying, Cheshire, UK, March