Marie Read / Cinnamon teal (Anas cyanoptera), male taking flight from water, Orange County, California, USA, April.

Tony Heald / South Georgia pintail (Anas georgica georgica) swimming in front of Southern elephant seal (Mirounga leonina), male. Gold Harbour, South Georgia. October.

Tony Heald / South Georgia pintail (Anas georgica georgica) pair, one preening. Gold Harbour, South Georgia. October.

Mary McDonald / South georgia pintail (Anas georgica georgica) Godthul, South Georgia, South Atlantic

Mike Potts / Southern bull kelp (Durvillaea sp) home to the Aukland Island Teal (Anas aucklandica) Enderby Island. Auckland Islands. Subantarctic New Zealand.

Mike Potts / South Georgia pintail (Anas georgica) feeding in a stream. Grytviken Harbour, South Georgia.

Mike Potts / South Georgia pintail (Anas georgica) feeding in a stream, metal and wood in background from old whaling station. Grytviken Harbour. South Georgia.

Bernard Castelein / Yellow-billed teal (Anas georgica) at Laguna Hedionda, between Polques and Quetena, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) on shore of Laguna Hedionda, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) Laguna Hedionda, Altiplano, Bolivia

Roy Mangersnes / Yellow-billed pintail (Anas georgica) on a small lake, Salisbury Plains, South Georgia.

Rick Price / Yellow-billed or Brown Pintail Duck (Anas georgica georgica), Cumberland Bay, Grytviken, South Georgia. January.

Rick Price / Two South Georgia pintail ducks (Anas georgica georgica) in snow, endemic species, King Haakon Bay, Peggoty Bluff, South Georgia, Antarctica. November.

Mike Potts / Auckland Island brown teal (Anas aucklandica) flightless and feeds and roosts in onshore kelp beds, lives predominantly on Enderby Island, Auckland Islands, Subantarctic New Zealand January

Mike Potts / Auckland Island brown teal (Anas aucklandica) flightless and feeds and roosts in onshore kelp beds, lives predominantly on Enderby Island, Auckland Islands, Subantarctic New Zealand January

Mike Potts / Auckland Island brown teal (Anas aucklandica) flightless and feeds and roosts in onshore kelp beds, lives predominantly on Enderby Island, Auckland Islands, Subantarctic New Zealand January

Mike Potts / Auckland Island brown teal (Anas aucklandica) flightless and feeds and roosts in onshore kelp beds, lives predominantly on Enderby Island, Auckland Islands, Subantarctic New Zealand January

Mark Carwardine / Yellow-billed / South Georgia pintail (Anas georgica), Grytviken, South Georgia, November

Mark Carwardine / Yellow-billed / South Georgia pintail (Anas georgica), Grytviken, South Georgia, November

David Tipling / South Georgia Pintail (Anas georgica georgica) taking off, Holmestrand, South Georgia January

David Tipling / South Georgia Pintails (Anas georgica georgica) three female swimming, Holmestrand, South Georgia January

David Tipling / South Georgia pintail (Anas georgica georgica) female with brood of ducklings, Albatross Island, South Georgia January

Gabriel Rojo / Yellow-billed pintail, (Anas georgica) in flight. La Pampa, Argentina

Gabriel Rojo / Yellow-billed pintail, (Anas georgica) two on water, La Pampa, Argentina

Gabriel Rojo / Yellow-billed pintail, (Anas georgica) on water, La Pampa, Argentina

Gabriel Rojo / Yellow-billed pintail, (Anas georgica) stretching feathers, La Pampa, Argentina

Gabriel Rojo / Yellow-billed pintail, (Anas georgica) on water, La Pampa, Argentina

Gabriel Rojo / Yellow-billed pintail, (Anas georgica), La Pampa, Argentina

Brent Stephenson / Yellow-billed pintail / South Georgia pintail (Anas georgica georgica) standing in a shallow stream, Salisbury Plain, South Georgia, South Atlantic, January. Endemic species.

Andy Trowbridge / Brown Teal (Anas chlorotis) portrait. Tiritiri Matangi Island, Hauraki Gulf, Auckland, New Zealand, September.

Andy Trowbridge / Brown Teal (Anas chlorotis) with legs banded for research purposes. Portrait. Tiritiri Matangi Island, Hauraki Gulf, Auckland, New Zealand, September.

Andy Trowbridge / Brown Teal (Anas chlorotis) with legs banded for research purposes. Portrait. Tiritiri Matangi Island, Hauraki Gulf, Auckland, New Zealand, September.

Andy Trowbridge / Brown Teal (Anas chlorotis) swimming on small pond. Tiritiri Matangi Island, Hauraki Gulf, Auckland, New Zealand. Endangered specie.s

Brent Stephenson / Male Brown Teal (Anas chlorotis) on pond. Cape Kidnappers, Hawkes Bay, New Zealand, October.

Mark Hughes / Aukland Island Flightless Duck (Anas aucklandica) stretching wings, Karori, Wellington, New Zealand

Mike Potts / Brown Teal (Anas chlorotis) Coromandel Peninsula, North Island, New Zealand. Endangered Species endemic to New Zealand.

Mike Potts / Brown Teal (Anas chlorotis) Coromandel Peninsula, North Island, New Zealand. Endangered Species endemic to New Zealand.

Mike Potts / Fencing to prevent Brown Teal (Anas chlorotis) from getting onto the road, with trap set for stoats and rats, Port Charles, Coromandel Peninsula, North Island, New Zealand, November 2009

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

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

Gabriel Rojo / Georgian teal / Brown pintail duck pair on nest {Anas georgica} La Pampa, Argentina

Mike Potts / Brown teal (Anas chlorotis) pair, North Island, New Zealand.

Mike Potts / Brown teal (Anas chlorotis), pair beside water, North Island, New Zealand.

Mike Potts / Brown teal (Anas chlorotis) pair beside water, North Island, New Zealand.

Tui De Roy / Auckland Island Flightless Duck (Anas aucklandica) foraging in kelp bed at low tide, Enderby Island, Auckland Group, sub-Antarctica New Zealand

Joel Sartore / Photo Ark / Brown teal (Anas chlorotis) head portrait, Kiwi Birdlife Park, Queenstown, New Zealand. Captive.

Joel Sartore / Photo Ark / Brown teal (Anas chlorotis) portrait, Kiwi Birdlife Park, Queenstown, New Zealand. Captive.

Roger Powell / Female Eurasian / Common teal (Anas crecca) standing on a submerged log, River Coquet estuary, Northumberland, UK. September.

Doug Gimesy / Yellow-billed pintail (Anas georgica) on water, South Georgia and the South Sandwich Islands, British overseas territory. Cropped.

Ben Cranke / King penguins (Aptenodytes patagonicus) congregate to rest, while a flock of South Georgia pintail (Anas georgica georgica) fly overhead. St Andrew's Bay, South Georgia Island

Ben Cranke / South Georgia pintail (Anas georgica georgica) yawning, Ocean Harbour, South Georgia Island.

Ben Cranke / South Georgia pintail (Anas georgica georgica). Stromness Bay, South Georgia Island

Ben Cranke / South Georgia pintails (Anas georgica georgica) flying, Stromness Bay, South Georgia Island

Ben Cranke / A South Georgia pintail (Anas georgica georgica) flying over King Edward Cove, South Georgia Island.