Roger Powell / Feral Pigeon / Rock dove {Columba livia} display-flying at nest site, Alcantara, Spain

GEORGETTE DOUWMA / Feral pigeons / Rock doves (Columba livia) perched on fence in park. London, UK

GEORGETTE DOUWMA / Feral pigeon / Rock dove (Columba livia) sitting on fence, London, UK

Inaki Relanzon / Rock Dove (Columba livia), two fledgling chicks in nest, South Spain

Michael Hutchinson / Mute Swans (Cygnus olor) and Feral Pigeons (Columba livia) on old pontoon, Bristol, UK

Michael Hutchinson / Feral pigeon (Columba livia) roosting on iron girder under balcony, Bristol, UK

Michael Hutchinson / Feral pigeons (Columba livia) roosting on iron girders under balcony, Bristol, UK

Michael Hutchinson / Wood pigeons (Columba palumbus) on chimney gaining warmth from house in winter, Bristol UK

Hanne & Jens Eriksen / Rock dove {Columba livia} bathing in pool of water, Dawkah, Oman

Jose B. Ruiz / Rock dove {Columba livia} Quintana de la Serena, Badajoz, Extremadura, Spain

John Downer / Feral Rock Dove (Columba livia) flying in St. Mark's square, Venice, Italy

David Tipling / Feral pigeon {Columba livia domestica} in flight, with building in background, London, UK.

David Tipling / Feral pigeons {Columba livia domestica} standing in snow, London, UK.

Pat De La Harpe / Portrait of Rock dove (Columba livia), Giants Castle Game Reserve, South Africa

Tom Vezo / Portrait of Rock dove {Columba livia} amongst vegetation, Long Island, New York, USA

Pete Cairns / Feral pigeons / Rock doves {Columba livia} in city park. Edinburgh, Scotland, UK.

Pete Cairns / Feral pigeons / Rock doves {Columba livia} perched on man's arm in city park. Edinburgh, Scotland, UK. Model released.

Pete Cairns / Women feeding Feral pigeons / Rock doves {Columba livia} in city park. Edinburgh, Scotland, UK.

Philippe Clement / Rock dove {Columba livia} Texan pioneer pair breeding in dovecot, Belgium

Philippe Clement / Urban pigeons {Columba livia} feeding in town square, Belgium

Kim Taylor / White Rock dove / Feral pigeon {Columba livia} in flight, UK.

Kim Taylor / White Rock dove / Feral pigeon {Columba livia} in flight, UK.

Kim Taylor / White Rock dove / Feral pigeon {Columba livia} in flight, UK.

Kim Taylor / Close-up of a Rock dove / Domestic pigeon {Columba livia} feather. UK.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight. Captive

Kim Taylor / Domestic pigeon / Rock dove {Columba livia} flight multiple exposure sequence, Captive

Kim Taylor / Pigeon garden fantail / Rock dove {Columba livia} flight multiple exposure sequence.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight. Captive

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, Captive, UK.

Kim Taylor / Pigeon garden fantail / Rock dove {Columba livia} flight multiple exposure sequence.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, Captive

Kim Taylor / Pigeon garden fantail / Rock dove {Columba livia} flight multiple exposure sequence.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, captive

Kim Taylor / Pigeon garden fantail / Rock dove {Columba livia} flight multiple exposure sequence.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, Captive

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, Captive

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight, Captive, UK.

Kim Taylor / Pigeon-garden fantail / Rock Dove {Columba livia} in flight. Captive

Kim Taylor / Domestic pigeon / Rock dove {Columba livia} flight multiple exposure sequence. Captive

Phil Savoie / Rock dove portrait {Columba livia} USA.

Kim Taylor / White Feral Pigeon / Rock dove (Columba livia) landing, captive, UK.

Kim Taylor / White doves (Columba livia) in flight. Captive, digital composite, UK.

Kim Taylor / Digital composite - Rock dove / Feral pigeon {Columba livia} embryo development in egg

Mark Taylor / Silhouette of English oak tree {Quercus robur} at sunset, UK.

Konrad Wothe / Rock Dove (Columba livia) on Empire State Building, Manhattan, New York

Konrad Wothe / Rock Dove (Columba livia) on Empire State Building, Manhattan, New York

Dave Watts / Feral pigeons / Rock doves {Columba livia} drinking from fountain, Siena, Italy

Hanne & Jens Eriksen / Rock dove {Columba livia} Al Ansab, Oman

John Downer Productions / Doves in a death-mimicking trance prompted by simply tucking heads under wings. Defensive tactic. (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

GEORGETTE DOUWMA / Feral pigeons (rock dove) {Columba livia} Regents Park, London, UK

GEORGETTE DOUWMA / Feral pigeons (rock dove) {Columba livia} feeding beside 'Do not feed the pigeons' sign, Regents Park, London, UK

GEORGETTE DOUWMA / Feral pigeon (rock dove) {Columba livia} Regents Park, London, UK

Jose B. Ruiz / Feral pigeon (Rock Dove) in park, Spain

Mark Brownlow / White doves in trance, lying on back, feigning death in self defence. When line drawn from their beak they fall into a trance

Paul Hobson / Rock doves/pigeons perched on fence, UK

Jane Burton / Street pigeon (Columba livia) one day old chick / squab, Surrey, England, July

Kim Taylor / White rock dove / Feral pigeon (Columba livia) in flight, carrying olive branch of peace, digital composite, Surrey, England

Jane Burton / Street pigeon (Columba livia) chick / squab hatching from egg, Surrey, England

Jane Burton / Street pigeon (Columba livia) blue checkers hen feeding a chick / squab in the nest, Surrey, England, July

Jane Burton / Street pigeon (Columba livia) blue checkers hen with chicks / squabs begging for food in the nest, Surrey, England, July

Hanne & Jens Eriksen / Rock dove at water {Columba livia} Dauka Oman

TOM WALMSLEY / Rock dove. Table Mountain (Columba livia) South Africa

Colin Seddon / Rock Dove portrait {columba livia} UK

Nick Garbutt / Rock doves / Feral pigeons {Columba livia} Kathmandu Nepal