Pedro Narra / Western swamphen (Porphyrio porphyrio) Sado estuary, Portugal. April

Pedro Narra / Purple swamphen (Porphyrio porphyrio) profile, Sado Estuary, Portugal. December

Sandesh Kadur / Purple swamphen (Porphyrio madagascariensis) in wetland. Lake Manyara National Park, Tanzania.

Andy Trowbridge / Purple Swamphen / Pukeko (Porphyrio porphyrio) searching for food along lake edge. Christchurch, New Zealand. July.

Sebastian Kennerknecht / Grey-headed Swamphen (Porphyrio poliocephalus) female, Diyasaru Park, Colombo, Sri Lanka

Mike Read / Purple swamp-hen (Porphyrio porphyrio) feeding on mat of vegetation, Quinta do Lago, Ria Formosa Nature Reserve, Algarve Portugal, February.

Andy Trowbridge / Pukeko (Porphyrio porphyrio) searching for food along lake edge. Christchurch, New Zealand, July

Oriol Alamany / Purple swamphen (Porphyrio porphyrio), Lord Howe island, Lord Howe Island Group UNESCO Natural World Heritage Site, New South Wales, Australia

Richard Du Toit / Purple gallinule (Porphyrio porphyrio)feeding, South Africa

Hanne & Jens Eriksen / Purple swamphen (Porphyrio porphyrio) Oman, October

Richard Du Toit / Purple gallinule (Porphyrio porphyrio) in flight, Marievale Bird Sanctuary, Gauteng Province, South Africa, September.

Hanne & Jens Eriksen / Purple swamphen (Porphyrio porphyrio) walking on lily pads (Nymphaeaceae), Thailand, February.

Ashish & Shanthi Chandola / Purple swamphen (Porphyrio poliocephalus), Boondala Bird Sanctuary, Sri Lanka.

Richard Du Toit / Purple Gallinule (Porphyrio porphyrio) on reeds, Marievale Bird Sanctuary, Gauteng Province, South Africa, August.

Richard Du Toit / Purple Gallinule (Porphyrio porphyrio) Rietvlei Nature Reserve, Gauteng Province, South Africa, April.

XI ZHINONG / Purple swamphen (Porphyrio porphyrio) in flight, China, March.

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Bueng Boraphet, Thailand

Greg Oakley / Purple Swamphen (Porphyrio porphyrio) wading, Victoria, Australia

Greg Oakley / Purple Swamphen (Porphyrio porphyrio) wading, Victoria, Australia

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Victoria, Australia

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Victoria, Australia

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Victoria, Australia

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Victoria, Australia

Rob Drummond / Purple Swamphen (Porphyrio porphyrio), Victoria, Australia

Bob Steele / Purple Swamphen (Porphyrio porphyrio), Bung Boraphet, Thailand

Patrick Donini / Purple Swamphen (Porphyrio porphyrio), Yanchep National Park, Australia

Jiri Slama / Purple Swamphen (Porphyrio porphyrio), Florida

Oscar Diez / Purple Swamphen (Porphyrio porphyrio), Andalucia, Spain

Oscar Diez / Purple Swamphen (Porphyrio porphyrio), Andalucia, Spain

Oscar Diez / Purple Swamphen (Porphyrio porphyrio), Andalucia, Spain

Ralph Martin / Purple Swamphen (Porphyrio porphyrio), Mallorca, Spain

Christine Jung / Purple Swamphen (Porphyrio porphyrio), Mallorca, Spain

Jan Wegener / Purple Swamphen (Porphyrio porphyrio), Australia

Jan Wegener / Purple Swamphen (Porphyrio porphyrio) standing on nest, Australia

Sebastian Kennerknecht / Purple Swamphen (Porphyrio porphyrio) grazing, Nga Manu Nature Reserve, North Island, New Zealand

Roland Seitre / Purple swamphens (Porphyrio porphyrio) Noumea, North Province, New Caledonia.

Ernie Janes / Purple Swamphen (Porphyrio porphyrio) in wetland, Sri Lanka

Laurent Geslin / Purple swamphen (Porphyrio porphyrio) Keoladeo Ghana NP, Bharatpur, Rajasthan, India

Juergen Freund / Purple Swamphen (Porphyrio porphyrio) in the wetlands of Muloorina Station near Lake Eyre South, South Australia, Australia

Juan Manuel Borrero / Illustration of Purple Gallinule (Porphyrio porphyrio). Pencil and watercolor painting.

Andrew Walmsley / Pukeko (Porphyrio porphyrio melanotus) pair mating. Christchurch, New Zealand, October. Sequence 3 of 3.

Andrew Walmsley / Pukeko (Porphyrio porphyrio melanotus) pair mating. Christchurch, New Zealand, October. Sequence 2 of 3.

Andrew Walmsley / Pukeko (Porphyrio porphyrio melanotus) pair mating. Christchurch, New Zealand, October. Sequence 1 of 3.

Andrew Walmsley / Pukeko (Porphyrio porphyrio melanotus) attempting to mate. Christchurch, New Zealand, October.

Andrew Walmsley / Pukeko (Porphyrio porphyrio melanotus). Christchurch, New Zealand, October.

Loic Poidevin / Purple swamphen (Porphyrio potphyrio) amongst reeds, Extremadura, Spain, July

Martin Willis / Purple Swamphen (Porphyrio porphyrio) reflected in the water as it feeds chick, Mongers Lake, Western Australia, Australia

Jonathan Harrod / Pukeko (Porphyrio porphyrio melanotus) pair mating, Christchurch, New Zealand

Jonathan Harrod / Pukeko (Porphyrio porphyrio melanotus) chick hatching, Christchurch, New Zealand

Jonathan Harrod / Pukeko (Porphyrio porphyrio melanotus) males eagerly pursuing female, Christchurch, New Zealand

Jonathan Harrod / Pukeko (Porphyrio porphyrio melanotus) pair courting, Christchurch, New Zealand

Brent Stephenson / Pukeko / Purple Swamphen (Porphyrio porphyrio) walking on short grass. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / Pukeko / Purple Swamphen (Porphyrio porphyrio) fluffed up showing characteristic white 'warning' undertail coverts. Tiritiri Matangi Island, Auckland, New Zealand, September.

Robin Chittenden / Purple swamphen (Porphyrio porphyrio) amongst reeds, Algarve, Portugal, October

Konrad Wothe / Two Purple swamphens (Porphyrio porphyrio) feeding on grass seeds, Atherton Tablelands, Queensland, Australia, November

Konrad Wothe / Purple swamphen (Porphyrio porphyrio) feeding on grass seeds, Atherton Tablelands, Queensland, Australia, November

Colin Monteath / Pukeko (Porphyrio porphyrio melanotus) near Akaroa, Banks Peninsula, Canterbury, New Zealand

Steve Nicholls / Purple swamphen (Porphyrio porphyrio) pair on nest, captive, occurs Africa

Brent Stephenson / Purple Swamphen / Pukeko (Porphyrio porphyrio) feeding its chick bits of grass stem. Tawharanui Regional Park, Auckland, New Zealand, October.

Vincent Grafhorst / Purple Swamphen (Porphyrio madagascariensis) in wetland habitat, Gaborone Game Reserve, Botswana

Mike Potts / Purple swamphen (Porphyrio porphyrio) drinking at water's edge, Lake Herdsman, Perth, Western Australia.

Chris Gomersall / Purple swamphen / gallinule (Porphyrio porphyrio) Rio Formosa Nature Reserve, Algarve, Portugal, March

Chris Gomersall / Purple swamphen / gallinule (Porphyrio porphyrio) feeding on reed stem or rhizome, Rio Formosa Nature Reserve, Algarve, Portugal, March 2008

Chris Gomersall / Purple swamphen / gallinule (Porphyrio porphyrio) on reeds, Rio Formosa Nature Reserve, Algarve, Portugal, March

Juan Carlos Munoz / Purple swamphen (Porphyrio porphyrio) amongst reeds in wetlands, Andalucia, Spain, March

Juan Carlos Munoz / Purple swamphen (Porphyrio porphyrio) walking past Flag irises on edge of marshland, Andalucia, Spain, March

Jouan & Rius / Purple swamphen (Porphyrio porphyrio), Murray riverland, South Australia, Australia

Jouan & Rius / Purple swamphen (Porphyrio porphyrio), Murray riverland, South Australia

Jouan & Rius / Purple swamphen (Porphyrio porphyrio) Murray riverland, South Australia, Australia

Thomas Marent / Purple Swamphen (Porphyrio porphyrio) wading, Bharatpur National Park, India

Roger Powell / Purple Swamphen {Porphyrio porphyrio} preening, Victoria, Australia

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} standing in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} ruffling feathers at lake edge, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} standing in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} wading in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} standing under vegetation at lake edge, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} standing in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} ruffling feathers at lake edge, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} preening feathers at lake edge, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} wading along lake edge, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} preening feathers in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} standing in lake, Donana NP, Sevilla, Spain

Jose B. Ruiz / Purple swamphen {Porphyrio porphyrio} ruffling feathers in lake, Donana NP, Sevilla, Spain

Steven David Miller / Purple swamphen {Porphyrio porphyio} adult feeding chick, Yanchep NP, Western Australia

Steven David Miller / Purple swamphen (Porphyrio porphyrio) sitting on nest, Queensland, Australia

Bernard Castelein / Purple swamphen {Porphyrio porphyrio} India

Juan Manuel Borrero / Purple gallinule / swamphen (Porphyrio porphyrio) Spain, Delta del llobregat NP

Juan Manuel Borrero / Purple gallinule / swamphen (Porphyrio porphyrio) Spain, Delta del llobregat NP

Jose B. Ruiz / Purple swamphen (gallinule), Spain

Sebastian Kennerknecht / Grey-headed Swamphen (Porphyrio poliocephalus) male, Diyasaru Park, Colombo, Sri Lanka

Sebastian Kennerknecht / Grey-headed Swamphen (Porphyrio poliocephalus) male in wetland, Diyasaru Park, Colombo, Sri Lanka

Rob Drummond/ BIA / Purple Swamphen (Porphyrio porphyrio) parent with fledgling, Victoria, Australia

Richard Du Toit / Purple Swamphen (Porphyrio porphyrio) building nest, Garden Route National Park, South Africa

Sebastian Kennerknecht / Purple Swamphen (Porphyrio porphyrio), Nga Manu Nature Reserve, North Island, New Zealand

Jonathan Harrod / Pukeko (Porphyrio porphyrio melanotus) wading, Christchurch, New Zealand

Jose B. Ruiz / Purple swamphen / gallinule (Porphyrio porphyrio) walking through wetlands, Spain