Andy Trowbridge / RF- Great Grey Owl (Strix nebulosa) adult and chicks on nest. Nest 'frame' is manmade. Ostersund, Sweden. June. (This image may be licensed either as rights managed or royalty free.)
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Doug Perrine / Corral of nests of Kemp's ridley turtle {Lepidochelys kempii} each nest is fenced and covered to protect from predators and flies, Rancho Nuevo, Gulf of Mexico, Mexico 2002
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Angelo Gandolfi / Common Kingfisher male feeds fish to 5-day-old chick in nest, Italy artificial nest
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Kerstin Hinze / Artificial nesting place for insects 'bug hotel'. Lower Saxony, Germany, September.
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Andy Trowbridge / RF- Great Grey Owl (Strix nebulosa) adult and chicks on nest. Nest 'frame' is manmade. Ostersund, Sweden. June. (This image may be licensed either as rights managed or royalty free.)
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Jean E. Roche / Aerial view of artificial island built for nesting colony of Slender billed gull (Chroicocephalus genei) Petite Camargue, Southern France, June 2007
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Kim Taylor / Red mason bee (Osmia rufa) female laying egg on pollen / nectar mix in egg cell of artificial bee nesting box, Surrey, UK, April
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Kim Taylor / Red mason bee (Osmia rufa) female building pollen retaining wall of mud and sand to separate egg cells in artificial nest box, Surrey, UK, April
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Roland Seitre / Conservation worker Ana Maria Velasquez and an assistant with artificial nesting boxes for parrots to raise chicks in. Orejiamarillo Nature Park, Jardin, Antioquia, Colombia.
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Nick Garbutt / Buildings constructed as 'artificial caves' to encourage Edible-nest swiflets (Aerodramus collocalia fuciphagus) to take up residence and nest. Nests are then collected seasonally and fetch extremely...
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Roland Seitre / Artificial nesting box used for rearing Yellow-shouldered Amazons (Amazona barbadensis). Isla Margarita, Nueva Esparta, Venezuela, 2007.
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Roland Seitre / Conservationist showing front panel of artificial nests used to rear Yellow-shouldered Amazons (Amazona barbadensis) in nesting holes. Isla Margarita, Nueva Esparta, Venezuela, 2007.
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Roland Seitre / Young Yellow-shouldered Amazons (Amazona barbadensis) seen through nesting hole of artificial nest. Isla Margarita, Nueva Esparta, Venezuela, 2007.
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Ann & Steve Toon / Insect hotel / Artificial nest holes and shelter for insects and invertebrates, in garden, UK, April 2011.
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Florian Möllers / Bird of prey expert Paul Sammer putting a young ringed Peregrine falcon (Falco peregrinus) back into an artificial next box on the Marienkirche, Alexanderplatz, Berlin, Germany, May 2006
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Florian Möllers / Black tern (Chlidonias niger) breeding on artificial nesting platform, Lake Mueggelsee, Berlin, Germany, June.
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Florian Möllers / Black tern (Chlidonias niger) breeding on artificial nesting platform, Lake Mueggelsee, Berlin, Germany, June.
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Nick Upton / Small traditional barn, with White storks (Ciconia ciconia) nesting on artificial platform nearby. Schorfheide-chorin Biosphere reserve, Brandenburg, Germany, May 2010.
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Bengt Lundberg / Artificial nesting raft for Black-throated diver (Gavia arctica) Sweden
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Adrian Davies / Osprey (Pandion haliaetus), pair perched on artificial nesting platform, Florida, USA.
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Inaki Relanzon / Pairs of White storks (Ciconia ciconia) on their nests (artificial), Aiguamolls de l'Emporda Natural Park, Girona, North Spain
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Philippe Clement / Artificial nest for bees, Texel, Netherlands
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Philippe Clement / Artificial nest for bees, Texel, Netherlands
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Niall Benvie / Man checking interior of artificial Sand martin (Riparia riparia) colony, Dumfriesshire, Scotland
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Doug Perrine / Corral of nests of Kemp's ridley turtle {Lepidochelys kempii} each nest is fenced and covered to protect from predators and flies, Rancho Nuevo, Gulf of Mexico, Mexico 2002
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Doug Perrine / Corral of nests of Kemp's ridley turtle {Lepidochelys kempii} each nest is fenced and covered to protect from predators and flies, Rancho Nuevo, Gulf of Mexico, Mexico 2002
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Colin Seddon / Harvest mouse on artificial nest of ball {Micromys minutus} Somerset, UK
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Kim Taylor / A bee box with Red Mason Bee nests (Osmia rufa) inside glass tubes. Surrey, UK
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Philippe Clement / Artificial nest site for bumble bee {Chelostoma campanularum} Belgium
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Philippe Clement / Artificial nest site for bumble bee {Chelostoma campanularum} Belgium
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Jean E. Roche / Artificial nest built for Kestrel {Falco tinnunculus} Marais poitevin, France
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Angelo Gandolfi / Common Kingfisher female brooding 5 day old chicks in artificial nest burrow {Alcedo atthis} Italy
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Angelo Gandolfi / Common kingfisher chicks in nest. 12 day-old {Alcedo atthis} Italy