Roland Seitre / Blue throated / Wagler's macaw (Ara glaucogularis) chick in nestbox, Santa Cruz Zoo, Teneriffe, Canary Islands, Critically endangered species from Bolivia
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Chris Gomersall / 2020VISION / Common starling (Sturnus vulgaris) adult with insect food arriving at nestbox to feed chicks, Hope Farm RSPB Reserve, Cambridgeshire, England, UK, May
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Wild Wonders of Europe / Varesvuo / European Roller (Coracias garrulus) pair with intruder Roller in nestbox, Hungary May 2008
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Wild Wonders of Europe / Varesvuo / European Roller (Coracias garrulus) attacking intruder Roller in nestbox, Pusztaszer, Hungary, May 2008
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Wild Wonders of Europe / Varesvuo / European Roller (Coracias garrulus) pulling intruder Roller out of nestbox, Pusztaszer, Hungary, May 2008
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Colin Varndell / Blue tit brings caterpillar to young in nestbox {Parus caeruleus} UK
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Nick Upton / All Saints Church which has over 40 swift nestboxes in the belfry and a thriving colony of breeding Common swifts (Apus apus), Worlington, Suffolk, UK, July.
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Nick Upton / Screaming party of Common swifts (Apus apus) flying around a church bell tower at dusk, where a large colony breeds in nestboxes behind the window louvres, All Saints Church, Worlington, Suffolk, UK,...
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Nick Upton / Screaming party of Common swifts (Apus apus) flying around a church bell tower at dusk, where a large colony breeds in nestboxes behind the window louvres, All Saints Church, Worlington, Suffolk, UK,...
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Nick Upton / Two nestboxes for Common swifts (Apus apus) made from plastic piping, attached to the wall of a block of flats, Edgecombe, Cambridge, UK, July.
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Nick Upton / Five nestboxes for Common swifts (Apus apus) made from plastic piping, attached to the wall of a block of flats, Edgecombe, Cambridge, UK, July.
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Nick Upton / Five nestboxes for Common swifts (Apus apus) made from plastic piping, attached to the wall of a block of flats, Edgecombe, Cambridge, UK, July.