Gary K. Smith / Common teal (Anas crecca) male, diving for food on coastal lagoon, North Norfolk, UK, October

Scott Leslie / Blue-winged Teal (Anas discors) male in spring, Nova Scotia, Canada

Gary K. Smith / Common teal {Anas crecca} male birds in flight over freshwater scrape, Norfolk, UK, December

Pete Oxford / Silver Teal (Anas versicolor) family swimming, Pebble Island, Falkland Islands

Roy Mangersnes / South Georgia / Yellow-billed pintail duck / Georgian teal (Anas georgica), Grytviken, South Georgia, Antarctica. November

Roy Mangersnes / South Georgia / Yellow-billed pintail duck / Georgian teal (Anas georgica), Grytviken, South Georgia, Antarctica. November

Donald M. Jones / Green-winged Teal (Anas carolinensis) male, western Montana

Donald M. Jones / Common Teal (Anas crecca) female on lake, western Montana

Donald M. Jones / Green-winged Teal (Anas carolinensis) male on lake, western Montana

David Kjaer / Falcated Duck (Anas falcata) male, captive, from Eastern Asia

Jouan & Rius / Grey Teal (Anas gracilis) feeding on water, Central Australia, Australia

Jouan & Rius / Grey teal (Anas gracilis) on water, Central Australia, Australia

Tim Laman / A male Cinnamon teal (Anas cyanoptera) preening his feathers, California

Norbert Wu / Mushroom Coral (Fungiidae) don't show flourescence as much when illuminated by the light of a camera flash, 40 feet deep, Komodo Island, Indonesia. Sequence 2 of 2

Norbert Wu / Mushroom Coral (Fungiidae) show fluorescence (and not) under normal daylight filtered by seaswater, 40 feet deep, Komodo Island, Indonesia. Sequence 1 of 2

Scott Leslie / Blue-winged Teal (Anas discors), Belleisle Marsh, Nova Scotia, Canada

Scott Leslie / Common Teal (Anas crecca) juvenile group, Belleisle Marsh, Nova Scotia, Canada

Rod Williams / Laysan duck / Teal (Anas laysanensis) captive, from Laysan Island, Critically Endangered Species

Andrew Parkinson / Common teal {Anas crecca} flock in flight over water, Yorkshire, UK

Jorma Luhta / Common teal {Anas crecca} male on water, Finland

Tui De Roy / Auckland Island Flightless Duck(Anas aucklandica) along shoreline, Enderby Island, Auckland Islands, sub-Antarctica New Zealand

Scott Leslie / Blue-winged Teal (Anas discors) female standing in pond, Annapolis Royal, Nova Scotia, Canada

Scott Leslie / Blue-winged Teal (Anas discors) female standing in pond, Annapolis Royal, Nova Scotia, Canada

Ingrid Visser / Aukland Island Flightless Duck (Anas aucklandica) on rock, Auckland Islands, New Zealand

Gary K. Smith / Common Teal (Anas crecca) male feeding at coastal pool on the saltings, Norfolk, England, UK, February

Rolf Nussbaumer / Green winged Teal {Anas carolinensis} male, Texas, USA, April

David Kjaer / Chestnut Teal (Anas castanea) male or drake, native to Southern Australia

Roger Powell / Grey Teal {Anas gracilis} family group preening and wing-stretching, Victoria, Australia

David Kjaer / Baikal Teal (Anas formosa) on water. Captive. Slimbridge, Gloucestershire, England

Chris Gomersall / South Georgia or Yellow-billed pintail duck (Anas georgica) South Georgia, Antarctica.

David Kjaer / Common teal (Anas crecca) males in flight over water, Gloucestershire, UK

David Kjaer / Mixed flock of Lapwing (Vanellus vanellus) and Dunlin (Calidris alpina) in flight over marsh with Teal (Anas crecca) and Wigeon (Anas penelope), Gloucestershire, UK

David Kjaer / Flock of Golden Plover (Pluvialis apricaria) roosting together with a few Lapwing (Vanellus vanellus) and Teal (Anas crecca) Gloucestershire, UK

Paul Hobson / Common teal {Anas crecca} male on water, Gloucestershire, UK

Graham Eaton / Teal (Anas crecca) UK

Steve Knell / Common teal duck {Anas crecca} male flapping wings on water, UK 2006

Roger Powell / Marbled Teal (Marmaronetta angustirostris) on water Tyne & Wear, U.K.

Richard Du Toit / Cape teal taking off (Anas capensis) Etosha NP, Namibia

Rod Williams / Sharp winged teal (Anas flavirostris oxyptera) native to Andes, South America, Captive

Dave Watts / Grey Teal (Anas gracilis) Tasmania, Australia

John Downer / John Downer filming imprinted teal duck from parascender for BBC series Supersense

George McCarthy / Male Cinnamon Teal (Anas cyanoptera) on water, NM, USA

George McCarthy / Male and female Blue-winged Teal (Anas discors) on water, Arkansas Refuge, Texas, USA

Rolf Nussbaumer / Male-female pair of Blue-winged Teal (Anas discors) Willacy County, Rio Grande Valley, Texas, USA. May 2004

Rolf Nussbaumer / Male Blue-winged Teal (Anas discors) preening, Port Aransas, Texas, USA. February 2003

Rolf Nussbaumer / Male Common Teal (Anas crecca) Unterlunkhofen, Switzerland. December 1998

Kerstin Hinze / Chilean / Yellow-billed Teal (Anas flavirostris) on lichen covered rocks, Carcass Island, Falkland Islands, South Atlantic Ocean

Rolf Nussbaumer / Male CommonTeal (Anas crecca), Unterlunkhofen, Switzerland. December 1998

Rolf Nussbaumer / Female CommonTeal (Anas crecca) Unterlunkhofen, Switzerland. December 1998

David Kjaer / Male (Drake) Common Teal (Anas crecca) Gloucestershire UK

David Kjaer / Male (drake) Common Teal (Anas crecca) calling, Gloucestershire UK

David Kjaer / Male (drake) Common Teal (Anas crecca) Gloucestershire UK

David Kjaer / Male (drake) Common teal (Anas crecca) in water, Gloucestershire UK

David Kjaer / Male (drake) Common Teal (Anas crecca) dabbling, Gloucestershire UK

David Kjaer / Male (left) and female Common Teal (Anas crecca) with other sleeping ducks behind, Gloucestershire UK

Rod Williams / Chestnut teal {Anas castanea} male, captive, from Australia

Rod Williams / Cinnamon teal {Anas cyanoptera septentrionalium} northern race, male, catpive, from north and central america

Rod Williams / Australian / New Zealand grey teal {Anas gracilis}, possibly a hybrid. Male, captive, from SE Asia and Australasia.

Rod Williams / Hottentot teal {Anas hottentota} captive, from central and southern africa

Rod Williams / Brazilian teal {Amazonetta brasiliensis} male with female behind, captive, from Eastern South America

Tui De Roy / Campbell Island Flightless Teal (Anas nesiotis) world's smallest duck, flightless, Codfish Island, New Zealand

Tui De Roy / Campbell Island Flightless Teal (Anas nesiotis) world's smallest duck, flightless, group at shoreline, Codfish Island, New Zealand

Mike Potts / Common Teal {Anas crecca} drake in saltwater creek, Lavan Sands, Gwynedd, North Wales, UK.

Simon Colmer / Marbled Teal duck (Marmaronetta angustirostris) resting on water, UK.

George McCarthy / Common teal {Anas crecca} male, Norfolk, UK

Elio Della Ferrera / Flock of Indian Whistling teal in flight {Dendrocygna javanica} Assam, India

DAVID TIPLING / Falcated teal {Anas falcata} male in breeding plumage, captive, UK

DAVID TIPLING / Ringed Teal {Callonetta leucophrys} Male, captive, UK

Shattil & Rozinski / Blue winged teal {Anas discors} Texas, USA

Tom Vezo / Blue winged Teal duck {Anas discors} on water, Florida, USA.

Tom Vezo / Cinnamon Teal duck {Anas cyanoptera} male on water, California, USA.

Hanne & Jens Eriksen / Silver Teal {Anas versicolor} profile on water surface, Falkland islands.

WILLIAM OSBORN / Portrait of Male Blue winged teal (Anas discors) resting, UK, C, notice the leg rings where bird has been tagged for research purposes

Simon Colmer / Marbled teal (Marmaronetta angustirostris) preening, Captive

Niall Benvie / Female Common teal duck (Anas crecca) resting on the shore of a tidal lagoon, winter, Montrose, Scotland

Niall Benvie / Male Common teal duck (Anas crecca) resting on the shore of a tidal lagoon, winter, Montrose, Scotland

Chris Gomersall / Common teal duck (Anas crecca) drake dabbling, Norfolk, UK

Chris Gomersall / Common teal duck (Anas crecca) drake swimming, Norfolk, UK

Jose B. Ruiz / Marbled teal duck {Marmaronetta angustirrostris} head profile, Spain.

Jose B. Ruiz / Marbled teal duck {Marmaronetta angustirrostris} Spain

Jose B. Ruiz / Marbled teal duck {Marmaronetta angustirrostris} profile, Spain.

Jose B. Ruiz / Marbled teal duck {Marmaronetta angustirrostris} Spain

Jose B. Ruiz / Marbled teal duck {Marmaronetta angustirrostris} head profile, Spain.

Rolf Nussbaumer / Blue winged teal {Anas discors} male, Welder Wildlife Refuge, Sinton, Texas, USA.

Gary Smith / Male CommonTeal {Anas crecca} profile, north Norfolk, UK.

David Kjaer / Northern shoveler with Teal and Pintail (Anas clypeata) Gloucestershire, England, UK, Europe

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP, paramo, Andes, Ecuador

Pete Oxford / Andean teal duck male {Anas andium} Cajas NP, Ecuador

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP. Ecuador

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP, paramo, Andes, Ecuador

DAVID TIPLING / Baikal teal male {Anas formosa} Captive UK, occurs Russia, vulnerable.

Flip de Nooyer / Blue-winged Teal (Anas discors) males on lake, North America

Rolf Nussbaumer / Blue winged teal male on water {Anas discors} Texas, USA

Rolf Nussbaumer / Male Green winged teal asleep with head tucked under wing, Texas, USA. {Anas carolinensis}

Tim Fitzharris / Blue-winged Teal (Anas discors) male taking off from lake, North America

Tim Fitzharris / Blue-winged Teal (Anas discors) on water, North America