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 / Cairns / Tengmalm's owl (Aegolius funereus) peering out of nestbox, Bergslagen, Sweden, June 2009
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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 / Red-footed falcon (Falco vespertinus) male at nesting box in Hortobagy NP, Hungary, May 2008
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Wild Wonders of Europe / Varesvuo / Red-footed Falcon (Falco vespertinus) male brings vole prey to female in nestbox, Hortobagy NP, 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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Flip de Nooyer / Eurasian Kestrel (Falco tinnunculus) group of five juveniles in nesting box, Europe
