Nick Upton / Jackdaw (Corvus monedula) hovering above a nest box it wants to nest in which a Grey squirrel (Sciurus carolinensis) and its mate have occupied, with the squirrel threatening the bird, Wiltshire, UK,...
Vishal Jadhav / Spotted owlet (Athene brama) female looking out of nest in rocks, males appears then flies off, Maharashtra, India, January.
Simon Littlejohn / Female American mink (Neogale vison) entering a Kingfisher (Alcedo atthias) nest and taking a chick, Stour River, Dorset, UK, July.
Simon Littlejohn / Common kingfisher (Alcedo atthis) perched outside its nest, opening its wings and beak in an aggressive display to a Common blackbird (Turdus merula) which eventually flies away, River Stour, Dorset,...
Kim Taylor / Female Red mason bee (Osmia bicornis) stocking her nest in a glass tube with nectar and pollen before laying an egg, followed by her sealing the cell with mud, Surrey, UK, April.
Richard Hopkins / Field vole (Microtus agrestis) cleaning itself in nest before leaving, Gloucestershire, UK, April.
Nick Upton / White stork (Ciconia ciconia) with three chicks in nest at top of an Oak tree, gaping in hot sunshine with one exercising its wings, Knepp Estate, Sussex, UK, June.
Nick Upton / Heath sand wasp (Ammophila pubescens) excavating a nest burrow in a bare sandy patch of heathland, flying back and forth, carrying away balls of sand between its mandibles and its raised front legs, D...
Marie Read / Black Skimmer (Rynchops niger) excavating nest scrape on beach by squatting and kicking backwards using its feet, Long Island, New York, USA, August.
Marie Read / Black Skimmer (Rynchops niger) brooding small chick in nest on beach, Long Island, New York, USA, August.
Marie Read / Black Skimmers (Rynchops niger) nesting, one adult feeds a fish to a small chick that emerges from underneath second adult, Long Island, New York USA, August.
John Cancalosi / Gila Woodpecker (Melanerpes uropygialis) bringing food to nest in Saguaro cactus (Carnegiea gigantea) before leaving, Sonoran Desert, Arizona, USA.
John Chan / Double-crested Cormorant (Phalacrocorax auritus) chicks sitting in nest, pestering parent for food before the parent feeds one of the chicks, California, USA, May.
Pal Hermansen / Pygmy owl (Glaucidium passerinum) looking directly at camera as it peers out of nest hole in dead tree trunk, Viken, Norway.
John Chan / Great blue heron (Ardea herodias) resting, perched prior to returning to nest site with nesting material, Bolsa Chica Ecological Reserve, Southern California, USA, February.
John Chan / Great blue herons (Ardea herodias) engaging in twig transfer during nest building, Bolsa Chica Ecological Reserve, Southern California, USA, February.
Kim Taylor / Female Red mason bee (Osmia bicornis) returning to her nest hole in a dead holly trunk, April.
Rose Summers / Two Common kestrel (Falco tinnunculus) chicks sitting in entrance of nest hole in tree trunk, one chick begins flapping its wings to strengthen them, Devon, England, UK, June.
Solvin Zankl / Female Pram bug (Phronima sedentaria) with young with young in nest made from salp body, Atlantic Ocean off Cape Verde. Captive.
Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) feeding crop milk to chick, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June
Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) chick stretching wings, watched by adult, at nest in breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June
Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) chick stretching wings on nest in breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June
Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) standing on nest in breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, July
Brian Bevan / Wren (Troglodytes troglodytes) feeding chicks and removing fecal sac from nest in garden, Bedfordshire, UK, August
Brian Bevan / Wood pigeon (Columba palumbus) resting with chick in nest before catching a fly and eating it, Bedfordshire, UK, August.
Stephen Dalton / Barn owl (Tyto alba) in flight approaching bell-tower, carrying rodent prey to young in nest. Sussex, UK.
Staffan Widstrand / Wild Wonders of China / Oriental / Crested honey buzzard (Pernis ptilorhynchus) feeding on honeycomb surrounded by bees, Chayi, Taiwan Controlled conditions
Staffan Widstrand / Wild Wonders of China / Oriental / Crested honey buzzard (Pernis ptilorhynchus) feeding on honeycomb surrounded by bees, Chayi, Taiwan. Controlled conditions
Ingo Arndt / Close up of Honey bees (Apis mellifera) forming 'chains' and a 'ball' at the top of their tree hole nest as they establish a colony, Germany.
Staffan Widstrand / Eurasian Hoopoe, (Upupa epops) coming out of burrow. Pusztaszer protected landscape, Kiskunsagi, Hungary, May
Philippe Clement / Blue tit (Cyanistes caeruleus) collecting cotton wool for nest building before flying out of frame, Belgium, April.
James Dunbar / Slow motion clip of a Beefly (Bombyliidae sp.) laying eggs by flicking them into the nest of a solitary bee, UK, April.
Simon Littlejohn / Bonelli's eagle chicks (Aquila fasciata) in nest pecking each other, aged one week, Andalusia , Spain, May.
Simon Littlejohn / Griffon vulture (Gyps fulvus) regurgitating food for its chick, chick struggles to eat, Andalusia, Spain, June.
Dave Watts / Hoopoe (Upupa epops) male and female pair visiting nest to feed chicks, France
John Cancalosi / Canada Goose (Branta canadensis) on nest with goslings, New York, USA.
Nick Upton / Buff-tailed bumblebee (Bombus terrestris) queen about to land at her nest burrow in a garden lawn with loaded pollen sacs to provision grubs that will become future workers for her colony, Wiltshire,...
John Shaw / Osprey (Pandion haliaetus) landing at its nest in a Bald cypress tree (Taxodium distichum) draped with epiphytic Spanish moss (Tillandsia usneoides). Blue Cypress Lake, Florida, USA. April.