Stephen Dalton / Barn owl (Tyto alba) in flight approaching bell-tower, carrying rodent prey to young in nest. Sussex, UK.

Philippe Clement / Blue tit (Cyanistes caeruleus) collecting cotton wool for nest building before flying out of frame, Belgium, April.

Ismaele Tortella / Black-legged kittiwake (Rissa tridactyla) nesting above a window, Lofoten, Norway, August.

Morley Read / Slow motion clip of a Spiny orb-weaver (Micrathena sp.) weaving a silk nest to protect its eggs, the nest is suspended from a thread to isolate it from predators, Amazon rainforest, Ecuador. Filmed at...

Nick Upton / Pair of White storks (Ciconia ciconia) arranging nest material on their nest, Knepp Castle Estate, Sussex, England, UK, April. This is the first recorded instance of White storks nesting in the UK for...

Nick Upton / Pair of White storks (Ciconia ciconia) arranging nest material on their nest, Knepp Castle Estate, Sussex, England, UK, April. This is the first recorded instance of White storks nesting in the UK for...

Nick Upton / White stork (Ciconia ciconia) male landing with nest material and joining his mate on their nest in an Oak tree at sunset, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of...

Brian Bevan / Long tailed tit (Aegithalos caudates) nest building, Bedfordshire, England, UK, April.

David Woodfall / Hedge which has been 'netted ' to prevent breeding birds nesting, which would delay building development of new homes. The tree in the background has also been cut back. Chester, Cheshire, Eng...

Sven Zacek / Ural owl (Strix uralensis) female on nest, male landing with twig in beak. Tartumaa, Southern Estonia. April.

Sven Zacek / Black woodpecker (Dryocopus martius) excavating nest hole. Valgamaa, Southern Estonia. April.

Philippe Clement / Great cormorant (Phalacrocorax carbo) bringing twig to nest in breeding colony, Belgium, March.

Dave Bevan / Common wasp (Vespula vulgaris) adding material to nest, Carmarthenshire, Wales, UK, July.

Dave Bevan / Female Chaffinch (Fringilla coelebs) bringing moss to nest and incorporating it into nest before flying out of frame, Carmarthenshire, Wales, UK, May.

Dave Bevan / Female Chaffinch (Fringilla coelebs) shaping nest with her body and wings, Carmarthenshire, Wales, UK, May.

Tui De Roy / Red-footed booby (Sula sula), pair nest building in tree. Darwin Bay, Genovesa Island, Galapagos.

Tui De Roy / Green turtle (Chelonia mydas) female digging nest, North coast, Santa Cruz Island, Galapagos

Dave Bevan / Juvenile Brown rats (Rattus norvegicus) raiding a chicken nest in a barn, filmed at night using an infra red camera, Carmarthenshire, Wales, UK, December.

Dave Bevan / Swallow (Hirundo rustica) feeding juveniles perched on a rope near nest in a barn, Carmarthenshire, Wales, UK, September.

Dave Bevan / Pair of Swallows (Hirundo rustica) feeding chicks at nest in a barn, filmed using infra red, Carmarthenshire, Wales, UK, September.

Dave Bevan / Slow motion clip of a Swallow (Hirundo rustica) flying into a barn in heavy rain, Carmarthenshire, Wales, UK, September.

Claudio Contreras / Caribbean Flamingo (Phoenicopterus ruber) building up mud whilst brooding egg, breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June, Finalist in the Portfolio Category of...

David Perpinan / Female Rock sparrow (Petronia petronia) feeding chick inside nest, filmed with an infrared camera, Spain, June.

David Perpinan / Rock sparrow (Petronia petronia) feeding chick outside nest, Spain, June.

Fred Olivier / Adelie penguin (Pygoscelis adeliae) stealing rock from another penguin for its nest, Adelie Land, Antarctica, January.

Francisco Marquez / Penduline tit (Remiz pendulinus) building a nest, Prespa National Park, Prespes, Greece, May.

SCOTLAND: The Big Picture / Golden eagle (Aquila chyrsaetos) female flying into nest site with small branch, Glen Tanar Estate, Cairngorms National Park, Scotland, UK, June.

Terry Whittaker / Water vole (Arvicola amphibius) swimming underwater, dragging nesting material back to its burrow, Kent, England, UK. October.

Fred Olivier / Chinstrap penguin (Pygoscelis antarcticus) moving a feather in its nest, Aitcho Island, South Shetland Islands.

Fred Olivier / Chinstrap penguin (Pygoscelis antarcticus) adding a stick to its nest and fighting with a neighbouring pair, Aitcho Island, South Shetland Islands.

Pedro Narra / Green turtle (Chelonia mydas) female digging nest on beach at night, Guinea Bissau. Endangered species. 3rd Place in the SOS Especes Menacees / SOS Endangered Species Portfolio category of the Terre S...

Bence Mate / Osprey (Pandion haliaetus) in flight with nesting material, Hungary, July. Nominated in the Telephoto category of the Terre Sauvage Nature Images Awards competition 2015.

Charlie Summers / Adelie Penguin (Pygoscelis adeliae) carrying stolen rock from another nest in rookery, Peterman Island, Antarctica, November.

Pal Hermansen / Kittiwake (Rissa tridactyla) breeding on house wall, Norway, March.

Angelo Gandolfi / White stork (Ciconia ciconia), nesting colony to provide alternative nesting area whilst the building they normally nest on is under repair. Extremadura, Spain, April.

Angelo Gandolfi / Gannets (Morus bassanus) courtship behavior on nest on abandoned boat, La Spezia Gulf, Italy. Mediterranean Sea. July.

Staffan Widstrand / Kittiwakes (Rissa tridactyla) nesting on wall of house, Vardo town, Varanger Peninsula, Norway, March.

Fred Olivier / Close-up of a Light-mantled sooty albatross (Phoebetria palpebrata) building its nest, Macquarie Island, Sub-Antarctic Australia.

Ole Jorgen Liodden / Barn swallow (Hirundo rustica) in mud collecting nesting material, collecting nesting material, with golden bokeh affect in puddle, Svalbard, Norway, June.

Hanne & Jens Eriksen / Ruppell's weaver (Ploceus galbula) male building nest, Oman, May

Denis-Huot / Village weaver bird (Ploceus cucullatus) male building a nest after the rains, Masai-Mara Game Reserve, Kenya. February.

Konrad Wothe / Leatherback turtle (Dermochelys coriacea) digging a nest, Trinidad, West Indies.

Ingo Arndt / Red wood ant (Formica rufa) carrying construction material to anthill (fir needles), Germany.

Ingo Arndt / Reed Warbler (Acrocephalus scirpaceus) nest in Senckenberg Natural Hystory Collection Dresden, Germany.

Ingo Arndt / Baya weaver (Ploceus philippinus) subadult birds practising building 'play nest', Singapore.

Ingo Arndt / Baya weaver (Ploceus philippinus) male flying to nest entrance, Singapore

Ingo Arndt / Green tree ant (Oecophylla smaragdina) group on entrance from nest, built from woven leaves, Northern Territory, Kakadu National Park, Australia.

Pål Hermansen,Pal Hermansen / Blue tit (Cyanistes caeruleus) with food in its beak at the entrance to its nest in the exhaust pipe of an old car, Bastnas, Sweden, June. Winner of the Fritz Polking Prize at the GDT competition 2013...