Bruce Thomson / Spinifex pigeon (Geophaps plumifera) flock on stony desert floor, Diamantina River, Queensland, Australia.

Paul Hobson / Turtle dove (Streptopelia turtur) standing at a drinking pool. Hungary. May.

Eladio Fernandez / Blue-headed quail-dove (Starnoenas cyanocephala) profile, Cuba. Endangered species. Endemic.

Karine Aigner / Blue-headed quail-dove (Starnoenas cyanocephala) on ground, Cuba

Staffan Widstrand / Western crowned pigeon, (Goura cristata), Aiduma Island, Triton Bay, near mainland New Guinea, Western Papua, Indonesian New Guinea

Staffan Widstrand / Western crowned pigeon, (Goura cristata), Aiduma Island, Triton Bay, near mainland New Guinea, Western Papua, Indonesian New Guinea

Rolf Nussbaumer / White-winged Dove (Zenaida asiatica), adults eating Firethorn (Pyracantha coccinea) berries, Hill Country, Texas, USA. February

Rolf Nussbaumer / White-winged Dove (Zenaida asiatica), adults eating Firethorn (Pyracantha coccinea) berries, Hill Country, Texas, USA. February

Rolf Nussbaumer / White-winged Dove (Zenaida asiatica), adult perched on icy branch of Yaupon Holly (Ilex vomitoria), Hill Country, Texas, USA. February

Rolf Nussbaumer / White-winged Dove (Zenaida asiatica), adult eating Firethorn (Pyracantha coccinea) berries, Hill Country, Texas, USA. February

Rolf Nussbaumer / White-winged Dove (Zenaida asiatica), adult perched on icy branch of Yaupon Holly (Ilex vomitoria), Hill Country, Texas, USA. February

Andy Trowbridge / Female Northern goshawk (Accipiter gentilis) perched on a branch in falling snow, with Wood pigeon (Columba palumbus) prey, Norway, January.

George Sanker / Mourning Dove (Zenaida macroura) perched on branch in snow, Acadia National Park, Maine, USA, February.

Alan Williams / Domestic pigeons (Columba livia) flock in flight over houses, Cheshire, UK, June.

Andy Trowbridge / Female goshawk (Accipiter gentilis) hiding Wood pigeon (Columba palumbus) prey from passing crows. Southern Norway, February.

Roland Seitre / Goliath Imperial Pigeon (Ducula goliath) feeding on fruit, Touaourou mission,Yate, South Province, New Caledonia.

Roland Seitre / Cloven-feathered dove (Drepanoptila holosericea) captive, Parc zoologique et forestier / Zoological and Forest Park, Noumea, South Province, New Caledonia

Robin Chittenden,Robin Chittenden / Wood Pigeon (Columba palumbus) Norwich, Norfolk, UK, March

David Tipling / Turtle Dove (Streptopelia turtur) illegally shot, at vets, BirdLife Malta Springwatch Camp, Malta, April 2013

Guy Edwardes / Feral Pigeon (Columba livia) drinking from Fonte Gaia (Fountain of Joy). Piazza del Campo, Sienna, Italy, September.

Luke Massey / 2020VISION / Two Turtle doves (Streptopelia turtur) perched on a rusting iron rail in a rain shower, Essex, England, UK, June.

Fergus Gill / 2020VISION / Collared dove (Streptopelia decaocto) perched on a snow covered branch, Perthshire, Scotland, UK, April.

Bertie Gregory / 2020VISION / Juvenile male Peregrine falcon (Falco peregrinus) in flight chasing his parent who has Feral pigeon (Columba livia) kill in claws, Bristol, England, UK, June.

Terry Whittaker / 2020VISION / Man with Feral pigeon (Columba livia) perched on his head, Regents Park, London, England, UK, February

Terry Whittaker / 2020VISION / Feral pigeon (Columba livia) on ground, with people's feet in the background, South Bank, London, England, UK, September. Did you know? In the 16th Century England pigeon guano was the only source of...

Terry Whittaker / 2020VISION / Feral pigeons (Columba livia), Manchester, England, UK, January. Did you know? Pigeons only have 40 taste buds whereas humans have around 10,000.

Terry Whittaker / 2020VISION / Young woman feeding Feral pigeons (Columba livia), Manchester, England, UK, February. Model released.

Paul D Stewart / 'Martha' the last passenger pigeon, (Ectopistes migratorius), who died Cincinnati Zoo, September 1st, 1914. This portrait of her published in March 1915 as the Frontispiece to William Hornaday's 'The...

Bernard Castelein / Rock doves (Columba livia), sitting in front of typical wall paintings of Shekhawathi region, Shekhawathi, Rajasthan, India

Bernard Castelein / Rock dove (Columba livia), sitting in front of typical wall paintings of Shekhawathi region, Shekhawathi, Rajasthan, India

Paul Hobson / Feral Pigeon / Rock Dove (Columba livia) on city street. Sheffield, UK.

Klaus Echle / Stockdove (Columba oenas) shadow on the trunk of beech tree. Black Forest, Germany, April.

Ernie Janes / Flock of white Fantail pigeons (Columba sp) in flight, UK

Mark Carwardine / Pink pigeon (Columba / Nesoenas mayeri) threatened / endangered species, Black River Gorges, Mauritius, Indian Ocean, wild

Mark Carwardine / Pink pigeon (Columba / Nesoenas mayeri) threatened / endangered species, Black River Gorges, Mauritius, Indian Ocean, wild

Mark Carwardine / Pink pigeon (Columba / Nesoenas mayeri) threatened / endangered species, Black River Gorges, Mauritius, Indian Ocean, wild

Mark Carwardine / Pink pigeon (Nesoenas / Columba mayeri) threatened / endangered species, Black River Gorges, Mauritius, Indian Ocean, wild

Laurent Geslin / Male Feral pigeon (Columba livia) touching female with his beak. Paris, France

Laurent Geslin / Wood pigeon (Columba palumbus) drinking beside a discarded coke can in Paris, France

Laurent Geslin / Wood pigeon (Columba palumbus) standing by a discarded coke can in Paris, France

Laurent Geslin / Wood pigeon (Columba palumbus) on grass near busy road, Paris, France. April.

Laurent Geslin / Wood pigeon (Columba palumbus) perched on the arm of a classical stone statue, urban park, Paris, France, April.

Laurent Geslin / Flock of Feral pigeons (Columba livia) in front of the Eiffel tower at dusk, Paris. France, November .

Laurent Geslin / Flock of Feral pigeons (Columba livia) feeding on bread in an urban street, in the rain, London, England, UK, October 2008.

Laurent Geslin / Flock of Feral pigeons (Columba livia) feeding on bread, landing / taking off in a busy urban street, London, England, UK, October 2008.