Marcos Baumann/ BIA / Speckled Teal (Anas flavirostris) flying, Valparaiso, Chile

Rod Williams / African yellowbill duck (Anas undulata undulata) captive, occurs in Southern and Eastern Africa.

Oscar Dewhurst / Yellow-billed teal (Anas flavirostris) swimming in Andean lake. Arequipa, Peru. September

Oscar Dewhurst / Yellow-billed teal (Anas flavirostris) perched on rock in river. Arequipa, Peru. September. Cropped

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

Mike Potts / Speckled Teal (Anas flavirostris) Saunders Island. Falkland Islands. January

Mike Potts / Speckled teal (Anas flavirostris) in stream, Saunders Island. Falkland Islands. January

Mike Potts / Speckled teal (Anas flavirostris) in stream, Saunders Island. Falkland Islands. January

Mike Potts / Speckled teal (Anas flavirostris) in stream, Saunders Island. Falkland Islands. January

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

Mike Read / Speckled teal (Anas flavirostris) pair with four ducklings on a pond Saunders Island, Falkland Islands. November 2016

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

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

Eric Baccega / Yellow-billed duck (Anas undulata) pair in the swamps of Mabamba, lake Victoria, Uganda

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

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

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

Mike Read / Speckled teal (Anas flavirostris) resting on pond. Sea Lion Island. Falkland Islands. November.

Mike Read / Speckled teal (Anas flavirostris) pair resting on grassland, Bleaker Island, Falkland Islands November

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.

Richard Du Toit / Yellowbilled duck (Anas undulata) flock, flying in a row, Marievale Bird Sanctuary, Gauteng Province, South Africa. June.

Cheryl-Samantha Owen / Yellow-billed duck (Anas undulata) and chicks on water, Rocherpan National Park, Western Cape, South Africa.

Gabriel Rojo / Yellow-billed teal (Anas flavirostris) two swimming, La Pampa, Argentina

Tim Laman / Speckled teal (Anas flavirostris) on rock, Carcass Island, Falkland Islands.

Ernie Janes / Shelduck (Tadorna tadorna) female with ducklings, Cley, Norfolk, East Anglia, England, UK, July.

Will Burrard-Lucas / Yellow-billed Ducks (Anas undulata) Bale Mountains National Park, Ethiopia.

Nick Upton / Yellow flag irises (Iris pseudacorus) flowering in a ditch in a damp lowland meadow with a Snout / Duck-billed Hoverfly (Rhingia campestris) resting on a petal, Wiltshire, UK, June.

Ann & Steve Toon / Yellow billed duck (Anas undulata) portrait, Intaka Island wetland centre, Cape Town, South Africa

Inaki Relanzon / Yellow-billed duck (Anas undulata) on water, Lake Bunyony, Uganda, Africa, July

Tony Heald / Yellow-Billed Duck (Anas undulata) on water. Cape Town, South Africa, January.

Tony Heald / Yellow-Billed Duck (Anas undulata) on water. Cape Town, South Africa, January.

Mark Carwardine / Yellow billed pintail duck (Anas georgica) on water, Slimbridge, Gloucestershire, UK, Captive, native to the Falklands and South Georgia, South America

Pete Oxford / Speckled / Chilean Teal (Anas flavirostris) on water, Sea Lion Island. South of mainland east Falkland Island. Falkland Islands