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Large wooden insect hotel in an autumn garden, Magdeburgerforth, Jerichower Land, Saxony-Anhalt,

BRK26C66_257

Large wooden insect hotel in an autumn garden, Mag...

Insect asylum, insect box, insect hotel, bee house, an artificial help for nesting and

BRK26C64_148

Insect asylum, insect box, insect hotel, bee house...

A macro photograph showcasing the striking linear patterns and mineral details inside a Whitcomb

BRK26C74_009

A macro photograph showcasing the striking linear ...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C75_415

Sand martin (Riparia riparia), approaching the bre...

Goosander (Mergus merganser) one day old fledglings at the breeding den in a field barn, a few

BRK26C92_026

Goosander (Mergus merganser) one day old fledgling...

Starling (Sturnus vulgaris) feeding the young bird in a woodpecker cavity, North Rhine-Westphalia,

BRK26D02_368

Starling (Sturnus vulgaris) feeding the young bird...

Starling (Sturnus vulgaris) at the breeding den, North Rhine-Westphalia, Germany

BRK26C82_147

Starling (Sturnus vulgaris) at the breeding den, N...

Nesting aid for earwigs, insects, clay pot with straw, rake on a wooden garden fence, Münsterland,

BRK26C58_403

Nesting aid for earwigs, insects, clay pot with st...

Insect asylum, insect box, insect hotel, bee house, an artificial help for nesting and

BRK26C64_015

Insect asylum, insect box, insect hotel, bee house...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C78_316

Sand martin (Riparia riparia), taking off from its...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C78_040

Sand martin (Riparia riparia), approaching the bre...

Blue tit (Parus caeruleus), with faeces in its beak on departure from the breeding den, Canton Zug,

BRK26C84_163

Blue tit (Parus caeruleus), with faeces in its bea...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C85_059

Sand martin (Riparia riparia), taking off from its...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C89_050

Sand martin (Riparia riparia), taking off from its...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C74_345

Sand martin (Riparia riparia), approaching the bre...

Underground construction site showing exposed dirt walls and temporary supports. The area is dimly

BRK26C94_425

Underground construction site showing exposed dirt...

Sand martin (Riparia riparia) at the breeding tube, Schleswig-Holstein, Germany

BRK26C95_374

Sand martin (Riparia riparia) at the breeding tube...

Great Spotted Woodpecker (Dendrocopos major) juvenile peering out from nest hole in tree, North

BRK26C62_433

Great Spotted Woodpecker (Dendrocopos major) juven...

Golden-cheeked Woodpecker Melanerpes chrysogenys El Tuito, Jalisco, Mexico 10 June Adult Female

BRK26D00_133

Golden-cheeked Woodpecker Melanerpes chrysogenys E...

Elf Owl Micrathene whitneyi Tucson, Pima County, Arizona, United States 9 May Adult peering from

BRK26C91_352

Elf Owl Micrathene whitneyi Tucson, Pima County, A...

Fischer's Lovebird (Agapornis fischeri) pair at breeding hole, Serengeti National Park, Tanzania

BRK26C84_042

Fischer's Lovebird (Agapornis fischeri) pair at br...

Eurasian Hoopoe (Upupa epops) juvenile peering out from nest cavity, Saxony-Anhalt, Germany

BRK26C89_465

Eurasian Hoopoe (Upupa epops) juvenile peering out...

Operation at the nest box entrance

BRK26C58_423

Operation at the nest box entrance

Eurasian Hoopoe (Upupa epops) feeding chick in breeding cavity, Saxony-Anhalt, Germany

BRK26C71_200

Eurasian Hoopoe (Upupa epops) feeding chick in bre...

Western Bluebird (Sialia mexicana) at nest cavity in the Sierra Nevada mountains of California

BRK26C76_373

Western Bluebird (Sialia mexicana) at nest cavity ...

Eurasian Hoopoe (Upupa epops) feeding chick in breeding cavity, Saxony-Anhalt, Germany

BRK26C80_054

Eurasian Hoopoe (Upupa epops) feeding chick in bre...

Waldkauz, lat. Strix aluco, schaut aus seinem Tageseinstand, einer alten Schwarzspechthöhle Anfang

BRK26C94_419

Waldkauz, lat. Strix aluco, schaut aus seinem Tage...

Gila Woodpecker Melanerpes uropygialis Tucson, Pima County, Arizona, United States 11 May Adult

BRK26D05_131

Gila Woodpecker Melanerpes uropygialis Tucson, Pim...

Sulphur-crested Cockatoo (Cacatua galerita) in nesting hollow, Victoria, Australia

BRK26C64_007

Sulphur-crested Cockatoo (Cacatua galerita) in nes...

European Green Woodpecker (Picus viridis) male at breeding cavity, Rhineland-Palatinate, Germany

BRK26C84_358

European Green Woodpecker (Picus viridis) male at ...

Alexandrine Parakeet (Psittacula eupatria) female peering out from nest hole, Hesse, Germany

BRK26C96_419

Alexandrine Parakeet (Psittacula eupatria) female ...

European Green Woodpecker (Picus viridis) female feeds chick in breeding cavity,

BRK26C98_027

European Green Woodpecker (Picus viridis) female f...

Black Woodpecker (Dryocopus martius) female at nest hole with chicks, North Rhine-Westphalia,

BRK26C99_098

Black Woodpecker (Dryocopus martius) female at nes...

Black Woodpecker (Dryocopus martius) female at nest hole with chick, North Rhine-Westphalia,

BRK26C58_260

Black Woodpecker (Dryocopus martius) female at nes...

Elf Owl Micrathene whitneyi Tucson, ARIZONA, United States 23 May Adult Strigidae

BRK26C59_463

Elf Owl Micrathene whitneyi Tucson, ARIZONA, Unite...

Elf Owl (Micrathene whitneyi) peering from nest hole in Saguaro cactus (Carnegiea gigantea),

BRK26C72_245

Elf Owl (Micrathene whitneyi) peering from nest ho...

Gilded Flicker Colaptes auratus Tucson, Pima Co., ARIZONA, USA 26 April Adult Female Picidae

BRK26C80_125

Gilded Flicker Colaptes auratus Tucson, Pima Co., ...

Eurasian Pygmy Owl (Glaucidium passerinum) juvenile in breeding cavity, Thuringia, Germany

BRK26C98_275

Eurasian Pygmy Owl (Glaucidium passerinum) juvenil...

Western Bluebird (Sialia mexicana) at nest cavity in the Sierra Nevada mountains of California

BRK26C99_232

Western Bluebird (Sialia mexicana) at nest cavity ...

Three sand martins, nominate form, (Riparia riparia riparia) flying and sitting in front of

BRK26C63_130

Three sand martins, nominate form, (Riparia ripari...

Gilded Flicker Colaptes auratus Tucson, Pima Co., ARIZONA, USA 26 April Adult Male Picidae

BRK26C80_293

Gilded Flicker Colaptes auratus Tucson, Pima Co., ...

Tawny Owl (Strix aluco) two chicks looking out from breeding hole, Saxony, Germany

BRK26C83_185

Tawny Owl (Strix aluco) two chicks looking out fro...

Hoopoe (Upupa epops) Bird of the Year 2022, male with caterpillar as food for the young bird,

BRK26D03_453

Hoopoe (Upupa epops) Bird of the Year 2022, male w...

Great spotted woodpecker (Dendrocopos major), breeding pair with food in their beaks at the

BRK26C57_088

Great spotted woodpecker (Dendrocopos major), bree...

Insect asylum, insect box, an artificial help for nesting and overwintering insects

BRK26C88_076

Insect asylum, insect box, an artificial help for ...

Eurasian Hoopoe (Upupa epops) feeding chick in breeding cavity, Saxony-Anhalt, Germany

BRK26C92_164

Eurasian Hoopoe (Upupa epops) feeding chick in bre...

Black Woodpecker (Dryocopus martius) male at nest cavity, Netherlands

BRK26C58_253

Black Woodpecker (Dryocopus martius) male at nest ...

Spotted Owlet (Athene brama) juvenile in breeding cavity, Rajasthan, India

BRK26C75_106

Spotted Owlet (Athene brama) juvenile in breeding ...

Western Bluebird (Sialia mexicana) at nest cavity in the Sierra Nevada mountains of California

BRK26C82_170

Western Bluebird (Sialia mexicana) at nest cavity ...

Alexandrine Parakeet (Psittacula eupatria) male peering out from nest hole, Hesse, Germany

BRK26C90_414

Alexandrine Parakeet (Psittacula eupatria) male pe...

Tawny Owl (Strix aluco) three chicks looking out from breeding hole, Saxony, Germany

BRK26C97_482

Tawny Owl (Strix aluco) three chicks looking out f...

African Lion (Panthera leo) male at waterhole, Masai Mara, Kenya

BRK26D04_471

African Lion (Panthera leo) male at waterhole, Mas...

European Green Woodpecker (Picus viridis) female feeding chick in nest hole, North

BRK26C55_450

European Green Woodpecker (Picus viridis) female f...

Dentist wearing black gloves using a dental mirror to examine patient's teeth during a checkup at a

BRK26C64_076

Dentist wearing black gloves using a dental mirror...

Little Owl, Athene noctua, in the nesting tree hole in the forest, central Europe. Portrait of

BRK26C65_227

Little Owl, Athene noctua, in the nesting tree hol...

Gila Woodpecker Melanerpes uropygialis Tucson, Arizona, United States 1 June Adult Female at nest

BRK26C70_154

Gila Woodpecker Melanerpes uropygialis Tucson, Ari...

Eurasian blue tit (Cyanistes caeruleus) flying away from a bird house, Bavaria, Germany

BRK26C76_139

Eurasian blue tit (Cyanistes caeruleus) flying awa...

Eurasian Pygmy Owl (Glaucidium passerinum) female looking out of breeding cavity, Bavaria, Germany

BRK26C90_099

Eurasian Pygmy Owl (Glaucidium passerinum) female ...

Alexandrine Parakeet (Psittacula eupatria) male peering out from nest hole, Hesse, Germany

BRK26C90_413

Alexandrine Parakeet (Psittacula eupatria) male pe...

Eurasian Nuthatch (Sitta europaea) bathing, Aosta Valley, Italy

BRK26D01_074

Eurasian Nuthatch (Sitta europaea) bathing, Aosta ...

European Green Woodpecker (Picus viridis) male at breeding cavity, Rhineland-Palatinate, Germany

BRK26D03_390

European Green Woodpecker (Picus viridis) male at ...

Eurasian Nuthatch (Sitta europaea) with food at nest cavity, Aosta Valley, Italy

BRK26D01_238

Eurasian Nuthatch (Sitta europaea) with food at ne...

Gilded Flicker Colaptes auratus Tucson, Pima Co., ARIZONA, USA 29 April Adult Female Picidae

BRK26C83_118

Gilded Flicker Colaptes auratus Tucson, Pima Co., ...

Alexandrine Parakeet (Psittacula eupatria) female peering out from nest hole, Hesse, Germany

BRK26C96_420

Alexandrine Parakeet (Psittacula eupatria) female ...

Horned mason bee (Osmia cornuta), sitting on a log of an insect hotel, Schwaz, Tyrol, Austria

BRK26C64_170

Horned mason bee (Osmia cornuta), sitting on a log...

Common Starling (Sturnus vulgaris) feeding young in nest hole, Rhineland-Palatinate, Germany

BRK26C71_387

Common Starling (Sturnus vulgaris) feeding young i...

Tawny Owl (Strix aluco) two chicks looking out from breeding hole, Saxony, Germany

BRK26C88_130

Tawny Owl (Strix aluco) two chicks looking out fro...

Eurasian Hoopoe (Upupa epops) feeding chicks in breeding cavity, Saxony-Anhalt, Germany

BRK26C90_364

Eurasian Hoopoe (Upupa epops) feeding chicks in br...

Black Woodpecker (Dryocopus martius) female at nesting hole, Poland

BRK26C96_150

Black Woodpecker (Dryocopus martius) female at nes...

Couch's Kingbird Tyrannus couchii Boca Chica, Texas, United States February Adult Tyrannidae

BRK26D03_468

Couch's Kingbird Tyrannus couchii Boca Chica, Texa...

Great Spotted Woodpecker (Dendrocopos major) female feeding chick in nest cavity, North

BRK26C61_374

Great Spotted Woodpecker (Dendrocopos major) femal...

Sand Martin (Riparia riparia) building nest hole, North Rhine-Westphalia, Germany

BRK26C90_189

Sand Martin (Riparia riparia) building nest hole, ...

Black Woodpecker (Dryocopus martius) female peering out from nesting hole, Netherlands

BRK26C62_246

Black Woodpecker (Dryocopus martius) female peerin...

Black woodpecker, (Dryocopus martius), mTuiere, birds, woodpeckers, family of the true woodpeckers,

BRK26C63_012

Black woodpecker, (Dryocopus martius), mTuiere, bi...

Domestic Cat (Felis catus) sneaking up bird nest box, Brandenburg, Germany

BRK26C67_121

Domestic Cat (Felis catus) sneaking up bird nest b...

Gilded Flicker Colaptes auratus Tucson, Pima Co., ARIZONA, USA 29 April Adult Male Picidae

BRK26C78_451

Gilded Flicker Colaptes auratus Tucson, Pima Co., ...

Starling (Sturnus vulgaris) at the breeding den, North Rhine-Westphalia, Germany

BRK26C38_288

Starling (Sturnus vulgaris) at the breeding den, N...

Sand martin (Riparia riparia) at the breeding tube, Schleswig-Holstein, Germany

BRK26C38_274

Sand martin (Riparia riparia) at the breeding tube...

Sand martin (Riparia riparia), pair at the breeding tube, Schleswig-Holstein, Germany

BRK26C38_275

Sand martin (Riparia riparia), pair at the breedin...

Sand martin (Riparia riparia), at breeding tube, Reussegg nature reserve, Canton Aargau,

BRK26C10_113

Sand martin (Riparia riparia), at breeding tube, R...

Mopanetoko (Tockus rufirostris), Southern Red-billed Hornbill, adult, on tree, alert, at breeding

BRK26C52_018

Mopanetoko (Tockus rufirostris), Southern Red-bill...

Goosander (Mergus merganser) one day old fledglings at the breeding den in a field barn, a few

BRK26C36_143

Goosander (Mergus merganser) one day old fledgling...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C10_142

Sand martin (Riparia riparia), approaching the bre...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C10_145

Sand martin (Riparia riparia), taking off from its...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C10_109

Sand martin (Riparia riparia), approaching the bre...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C10_110

Sand martin (Riparia riparia), taking off from its...

Goosander (Mergus merganser) female at the breeding den in a field barn, a few seconds in front of

BRK26C36_142

Goosander (Mergus merganser) female at the breedin...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C10_144

Sand martin (Riparia riparia), taking off from its...

Southern Yellow-billed Hornbill (Tockus leucomelas), Red-ringed Hornbill, adult, male, at breeding

BRK26C52_035

Southern Yellow-billed Hornbill (Tockus leucomelas...

Sand martin (Riparia riparia), taking off from its breeding tube, Reussegg nature reserve, Canton

BRK26C10_111

Sand martin (Riparia riparia), taking off from its...

Sand martin (Riparia riparia), approaching the breeding tube, Reussegg nature reserve, Canton

BRK26C10_114

Sand martin (Riparia riparia), approaching the bre...

Insect hotel, artificially created shelter, nesting aid and overwintering aid for insects in the

BRK26C55_176

Insect hotel, artificially created shelter, nestin...

Kestrel (Falco tinnunculus), female at the breeding den in a rock, Algarve, Portugal

BRK26C38_348

Kestrel (Falco tinnunculus), female at the breedin...

A starling (Sturnus vulgaris) looks away from its breeding den in a natural hollow on the trunk of

BRK26C04_429

A starling (Sturnus vulgaris) looks away from its ...

Bee or bug hotel or insect house on a brick wall in a garden, England, United Kingdom

BRK26C37_480

Bee or bug hotel or insect house on a brick wall i...

Insect hotel, artificially created shelter, nesting aid and overwintering aid for insects in the

BRK26C55_187

Insect hotel, artificially created shelter, nestin...

A starling (Sturnus vulgaris) sits in front of its breeding den natural den away from a tree trunk

BRK26C04_430

A starling (Sturnus vulgaris) sits in front of its...

Eurasian blue tit (Cyanistes caeruleus) coming out of a bird house, Bavaria, Germany

BRK26C41_484

Eurasian blue tit (Cyanistes caeruleus) coming out...

A starling (Sturnus vulgaris) hatching in its natural nesting cavity in a tree trunk of a black

BRK26C04_432

A starling (Sturnus vulgaris) hatching in its natu...

Raccoon (Procyon lotor), young animal looking out of a tree hollow, North Rhine-Westphalia, Germany

BRK26C38_482

Raccoon (Procyon lotor), young animal looking out ...

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