Mark MacEwen / Broad snouted caiman (Caiman latirostris) baby in mothers mouth being carried from nest, Sante Fe, Argentina, February

JIM CLARE / Buffon's / Great green macaw (Ara ambigua) adult pair at nest hole in Almendro tree, Costa Rica

JIM CLARE / Buffon's / Great green macaw (Ara ambigua) adult pair in nest hole in Almendro tree, Costa Rica

JIM CLARE / Buffon's / Great green macaw (Ara ambigua) chick in nest hole in Almendro tree, Costa Rica

JIM CLARE / Buffon's / Great green macaw (Ara ambigua) chick in nest hole in Almendro tree, Costa Rica

JIM CLARE / Buffon's / Great green macaw (Ara ambigua) perched near nest in Almendro tree, Costa Rica

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adults and chicks on nests on the Tyne Bridge. Newcastle, UK. July.

Nick Upton / Leafcutter / Rose-cutter bee (Megachile willughbiella) lands at its nest in a Bamboo tube in an insect hotel near several nests she has completed and some Potter wasp (Ancistrocerus sp.) nests, Wiltsh...

Philippe Clement / Northern gannets (Morus bassanus) sitting on nests made with plastic, Hermaness NNR, Unst, Shetland Islands, Scotland, UK, May.

Philippe Clement / Northern gannets (Morus bassanus) preening, sitting on nests made with plastic, Hermaness NNR, Unst, Shetland Islands, Scotland, UK, May.

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

Tui De Roy / Brown pelican (Pelecanus occidentalis) Galapagos

Ingo Arndt / Common wasp (Vespula vulgaris) detail of nest surface, Hessen, Germany, April.

Ingo Arndt / Cathedral Termite mount, Litchfield National Park, Northern Territory, Australia

Ingo Arndt / Magnetic termite (Amitermes meridionalis) aerial view of mounds in grassland, Litchfield National Park, Northern Territory, Australia.

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

Ingo Arndt / Magnetic Termite (Amitermes meridionalis) mounds in grassland, Litchfield National Park, Northern Territory, Australia.

Ingo Arndt / Weaver bird nest (Ploceus sp.) detail from Africa in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Harvest Mouse (Micromys minutus) nest, 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 / Cape gannets (Morus capensis / Sula capensis) at nesting colony, zooming from tight to wide shot, Lamberts Bay, South Africa, December

Ingo Arndt / European Red Wood Ant (Formica polyctena) nests in pine forest, Hessen, Germany, July.

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

Ingo Arndt / Villagers collecting eggs from Olive ridley sea turtles (Lepidochelys olivacea) during the first two days of the arribada (mass nesting event). This is the only place in the world where it is legal to...

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) digging their nests by night with stars during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore at twilight during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / King Penguin (Aptenodytes patagonicus) rookery crowded with nesting birds incubating eggs or protecting their small chicks, Salisbury Plain, South Georgia Island, February 2011

Ingo Arndt / Seabird colony nesting on cliff face, Lange Anna, Helgoland, Germany

Ingo Arndt / Magellanic penguin in nest hole {Spheniscus magellani} Patagonia, Chile, South America

Ingo Arndt / Blue footed booby with chick and egg at ground nest {Sula nebouxii} Seymour Is, Galapagos

Ingo Arndt / Common hamster in nest {Cricetus cricetus} Germany

Pedro Narra / Man and woman undertaking monitoring work measuring Green turtle (Chelonia mydas) nests as the the female digs it, Bissagos Islands, Guinea Bissau. Endangered species. 3rd Place in the SOS Especes M...

Tui De Roy / Little blue / fairy penguin (Eudyptula minor) walking on pathway to nesting burrows, Neck Game Reserve, Bruny Island, Tasmania, Australia, December.

Andy Trowbridge / Four Yellow-eyed penguins (Megadyptes antipodes) walking up a sand dune towards their nests, Otago Peninsula, Otago, South Island, New Zealand. September. Endangered Species.

Peter Cairns / 2020VISION / Northern gannets (Morus bassanus) in flight at nesting colony on cliffs, Hermaness NNR, Unst, Shetland Islands, Scotland, UK, June

David Tipling / 2020VISION / Reed warbler (Acrocephalus scirpaceus) with twelve day old Cuckoo (Cuculus canorus) chick at nest, Norfolk, England, UK, May

Andy Rouse / 2020VISION / Two juvenile Little owls (Athene noctua) jumping out of nest hole onto a roof, Wales, UK, June 2012.

Juan Carlos Munoz / Masked weaverbird (Ploceus velatus) nests in palm tree, Namaqualand, Northern Cape province, South Africa, September 2012.

Sam Hobson / Northern goshawk (Accipiter gentilis) nestlings inside treetop nest, handled by Dr. Norbert Kenntner. Part of an urban goshawk colour ringing study. Berlin, Germany, May 2014. Nominated in the Melvita...

Hougaard Malan / Quiver tree with sociable weaver (Philetairus socius) nest in morning light. Quiver Tree Forest, Keetmanshoop, Namibia. March 2011.

Markus Varesvuo / Shag (Phalacrocorax aristotelis) at nest site, Norway

Markus Varesvuo / Guillemot (Uria aalge) flock in flight over nesting colony on rocks, Norway, July 2008

Ramon Navarro / Whiskered tern (Chlydonias hybrida) passing frog prey to a chick at nest, Donana National Park, Seville, Spain, August.

Jabruson Motion / THIS VIDEO CLIP WILL BE AVAILABLE TO VIEW ONLINE SOON. TO VIEW NOW, PLEASE CONTACT US. -Close-up of a young Western gorilla (Gorilla gorilla) 'Tembo', member of the 'Makumba' group, breaking open a te...

Jabruson Motion / THIS VIDEO CLIP WILL BE AVAILABLE TO VIEW ONLINE SOON. TO VIEW NOW, PLEASE CONTACT US. -Close-up of a young Western gorilla (Gorilla gorilla) 'Tembo', member of the 'Makumba' group, breaking open a te...

Luiz Claudio Marigo / Jabiru (Jabiru mycteria) stork parents at nest with chicks with Pink Ipe tree (Tabebuia ipe / Handroanthus impetiginosus) in flower in background, Pantanal, Mato Grosso State, Western Brazil.

Nick Garbutt / Adult Helmet Vanga (Euryceros prevostii) incubating a clutch of 3 eggs. Nest constructed in the fork of a Bird's Nest Fern (Asplenium sp.) Masoala National Park, north east Madagascar.

Mike Read / White stork (Ciconia ciconia) pair silhouetted on nest at sunset near Castro Verde, Alentejo, Portugal, February.

John Waters / Walkers strolling along the bank between in flooded Aller Moor, with mistletoe laden apple tree, near Burrowbridge, Somerset Levels, Somerset, UK. January 2014

Chris & Monique Fallows / King penguin chicks (Aptenodytes patagonicus) South Georgia Island, Antarctica

Kim Taylor / European Hornet (Vespa crabro) queen approaching nest. Surrey, England, May

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) nest amongst the buildings at Port Lockroy, Wiencke Island, Antarctic Peninsula, Antarctica

Ben Cranke / Gentoo Penguin (Pygoscelis papua) nesting, Petermann Island, Antarctic Peninsula, Antarctica

Pal Hermansen / Song thrush (Turdus philomelos) feeding chicks at nest in old abandoned car, in a 'car graveyard' Varmland, Sweden

Pal Hermansen,Pal Hermansen / Blackbird (Turdus merula) nest with eggs in motor of abandoned car in 'car graveyard' Varmland, Sweden, May

Sven Zacek / Tawny owl (Strix aluco) peering out of its nest hole in tree, Southern Estonia, February.

Pal Hermansen / Song thrush (Turdus philomelos) feeding chicks in a nest in an old car, Bastnas, Sweden, July. Winner of the Urban Wildlife Category at the Wildlife Photographer of the Year Awards (WPOY) 2013. Winner...

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...

Laurent Geslin / White stork {Ciconia ciconia} pair at nest at night, Marrakech, Morocco, January

Laurent Geslin / Blue tit (Parus caeruleus) at the entrance to its nest in a tree, viewed from inside, Geneva, Switzerland

Laurent Geslin / Common cormorant (Phalacrocorax carbo) colony in trees, with industrial chimneys in the background, Walthamstow, England, UK

Laurent Geslin / Feral pigeon (Columba livia) on its nest with two chicks, above the streets of Geneva, Switzerland

Bert Willaert / Green-backed Firecrown (Sephanoides sephanoides) nesting next to a hiking trail in Mocha Island National Reserve, Mocha Island, Chile, December

TOM MANGELSEN / Male Resplendent quetzal (Pharomachrus mocinno) perched at its nest hole, El Triunfo Biosphere Reserve, Sierra Madre de Chiapas, Mexico.

David Tipling / House Martin (Delichon urbicum) leaving nest under eaves of house, Northumberland, UK, July

Denis-Huot / Lion (Panthera leo) cubs sitting on termite mound, Masai-Mara, Kenya. Vulnerable species.

Axel Gomille,Axel Gomille / Asian Elephant (Elephas maximus) femalenext to termite mound in forest, Nagarhole National Park, South India

Sven Zacek / Woman and child looking at a thrush (Turdidae) nest. Southern Estonia, August. Model released

Staffan Widstrand / Polar Bear (Ursus maritimus) mobbed by possibly a Skua, Svalbard, Norway, July

Andrew Walmsley / Arctic terns (Sterna paradisaea), adults defending their nests from photographers, Northumberland, June. No release available.

Loic Poidevin / Muskrat (Ondatra zibethicus) feeding at hole bt water. Breton Marsh, West France, September.

Mark MacEwen / Broad snouted caiman (Caiman latirostris) hatching from egg in nest, Sante Fe, Argentina, February

Christophe Courteau / African Paradise Flycatcher (Terpsiphone viridis) male sitting on nest on small branches in the shade. Okavango Delta, Botswana

Andy Trowbridge / Great Grey Owl (Strix nebulosa) adult and chicks on nest. Nest 'frame' is manmade. Ostersund, Sweden. June.

Andy Trowbridge / Great Grey Owl (Strix nebulosa) adult bringing food to chicks on nest. Nest 'frame' is manmade. Ostersund, Sweden. June.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years trying to break into a termite nest, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repub...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Mobangi' aged 5 years feeding on termites from a nest he has broken open, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Centra...

Yukihiro Fukuda / Male Japanese giant salamander (Andrias japonicus) protecting his eggs inside his nest, Japan, October

Yukihiro Fukuda / Male Japanese giant salamander (Andrias japonicus) protecting his eggs inside his nest, Japan, September

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) at the entrance to its nest, raising its head to the surface, Japan, August

Roger Powell / Stone curlew (Burhinus oedicnemus) approaching nest of two eggs, Guerreiro, Castro Verde, Alentejo, Portugal, April

Roger Powell / Cattle egret (Bubulcus ibis) in flight carrying a large stick to its nest, Guerreiro, Castro Verde, Alentejo, Portugal, May

Yukihiro Fukuda / Male Japanese giant salamander (Andria japonicus) emerging from a nest hole in order to breathe, Japan, August

Tui De Roy / Sparkling violetear hummingbird (Colibri coruscans) incubating eggs at nest, Andean cloud forest, Ecuador

Tui De Roy / Great frigatebird (Fregata minor) male guarding single chick. Punta Cevallos, Espanola Island, Galapagos, Ecuador, May.

Tui De Roy / Flightless Cormorant (Nannopterum / Phalacrocorax harrisi) with chick at nest, made from dead starfish. Banks Bay, Isabela Island, Galapagos Islands, Ecuador, December.

Loic Poidevin / Yellow warbler (Dendroica petechia) at nest, Pointe Pelee, Ontario, Canada, May

Rob Jordan / 2020VISION / Merlin (Falco columbarius) female on perch with Meadow Pipit chick prey for its offspring. Sutherland, Scotland, UK, June. 2020VISION Book Plate.

Rob Jordan / 2020VISION / Merlin (Falco columbarius) female on perch with Meadow Pipit chick prey for its offspring. Sutherland, Scotland, June.

Rob Jordan / 2020VISION / Merlin (Falco columbarius) female on perch with Meadow Pipit chick prey for its offspring. Sutherland, Scotland, June.

Rob Jordan / 2020VISION / Merlin (Falco columbarius) female on perch with Meadow Pipit chick prey, legs just visible, for its offspring. Sutherland, Scotland, June.