Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider (Misumena vatia) prey to nest, Monmouthshire Wales, UK, May.

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

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

John & Mary-Lou Aitchison / Female European otter (Lutra lutra) bringing a fish to a juvenile sleeping on a rock, Scotland, UK, November.

Alain Ghignone/ BIA / Red-backed Shrike (Lanius collurio) mother feeding fledgling, Aosta Valley, Italy

Alain Ghignone/ BIA / Great Crested Grebe (Podiceps cristatus) pair feeding chick, Piedmont, Italy

SCOTLAND: The Big Picture / European river otter (Lutra lutra) female bringing octopus ashore for cub, Shetland, Scotland, UK, October.

Andy Rouse / Bengal tiger (Panthera tigris tigris) female 'Noor T19' bringing down Sambar deer (Rusa unicolor) Ranthambhore, India. Sequence 6 of 18.

Donald M. Jones / Hairy Woodpecker (Picoides villosus) male with prey at nest cavity entrance, western Montana

Kevin Schafer / Gentoo Penguin (Pygoscelis papua) male bringing stones to female with chicks, Pleneau Island, Antarctic Peninsula, Antarctica

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

Nick Upton / 2020VISION / Common / Eurasian cranes (Grus grus) three 18 month juveniles, 'Bart', 'Christine' and 'Gilbert', released by the Great Crane Project onto the Somerset Levels and Moors, calling in Barley stubble fiel...

Markus Varesvuo / Ural Owl (Strix uralensis) bringing rodent prey to her chicks in a hollow tree-stump. Kuusamo, Finland, May.

Steve Gettle / Barn Swallow (Hirundo Rustica) feeding chicks in nest, Michigan

Steve Gettle / Barn Swallow (Hirundo Rustica) feeding, Michigan

Rolf Nussbaumer / Barn Owl {Tyto alba} adult bringing mouse prey to young in nest, Rio Grande Valley, Texas, USA, May

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female bringing food to nest cavity, Madera Canyon, Arizona

Charlie Hamilton James / Common kingfisher {Alcedo atthis} male bringing fish to 8 day chicks in nest, England

Pete Oxford / African Lion (Panthera leo) female bringing down Sable Antelope (Hippotragus niger), Africa

Pete Cairns / Hen harrier (Circus cyaneus) adult female bringing Meadow pipit prey to nest, Sutherland, Scotland, UK

Anup Shah / African lions {Panthera leo} bringing down an African buffalo {Syncerus caffer} Masai Mara GR, Kenya

Anup Shah / Lion pride (Panthera leo) bringing buffalo down, Masai Mara, Kenya Adult females & juveniles

Kim Taylor / European robin (Erithacus rubecula) bringing food to its nest. UK

Kim Taylor / Leaf-cutting bee {Megachile sp) female bringing leaf section to nest amongst roots of cactus.

Jim Brandenburg / Bald Eagle (Haliaeetus leucocephalus) bringing fish to mate in nest, Northwoods, Minnesota

Karl Ammann / Bringing out timber from Tanjung Puting NP, Central Kalimantan, Borneo, Indonesia

Staffan Widstrand / Black Tern (Chlidonias nigra) bringing food for its on the floating vegetation in the Nemunas Delta Nature Reserve, Lithuania.

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell, Monmouthshire, Wales, UK, May.

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell Monmouthshire, Wales, UK, May..

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell Monmouthshire, Wales, UK. May.

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load for brood cell Monmouthshire, Wales, UK, May.

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell, Monmouthshire, Wales, UK. May

Phil Savoie / Red mason bee (Osmia bicornis) female bee bringing in pollen load under her abdomen for brood cell in bee hotel. Monmouthshire, Wales, UK. May.

David Tipling / Western marsh harrier (Circus aeruginosus) female in flight bringing in nest material into reedbed North Norfolk, England, UK. April.

Sven Zacek / Ural owl (Strix uralensis) male bringing food to the nesting female, Tartumaa county, Southern Estonia. April

Oscar Dewhurst / Barn owl (Tyto alba) in flight, bringing prey back to the nest for its chicks at sunset. Suffolk, UK. June

Bernard Castelein / Indian cormorant (Phalacrocorax fuscicollis) flying close to the water surface intending to dip water and bringing it to the chicks in its nest, Keoladeo NP, Bharatpur, India

Terry Whittaker / Gannets (Morus bassanus) bringing seaweed to mate at nest in colony on Skoruvikurbjarg cliffs, above rough sea, Langanes Peninsula, Northeast Iceland. May.

Neil Aldridge / Identification notches in the ear of a sedated White rhinoceros (Ceratotherium simum) during a translocation operation bringing rhinos from South Africa to the Okavango Delta in northern Botswana as p...

Nick Upton / White stork (Ciconia ciconia) bringing extra nest material to its nest, whilst its mate sits. In captive breeding colony raising chicks for UK White Stork reintroduction project at the Knepp Estate. C...

Donald M. Jones / Bullock's Oriole (Icterus bullockii) parent with prey at nest with begging chicks, Montana

Thomas Marent / Saffron-crowned Tanager (Tangara xanthocephala) parent bringing food to fledgling, Valle del Cauca, Colombia

Graeme Guy/ BIA / Coppersmith Barbet (Megalaima haemacephala) parent feeding chick in nest cavity, Penang, Malaysia

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) parent feeding chicks in nest cavity, Saxony-Anhalt, Germany

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) parent feeding chicks in nest cavity, Saxony-Anhalt, Germany

Philippe Clement / Male Moorhen (Gallinula chloropus) bringing twigs to female and building nest, France, May.

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

Karine Aigner / Kirtland's warbler (Setophaga kirtlandii) female in Jack pine habitat bringing food to her nest, Michigan, USA, July.

Staffan Widstrand / Wild Wonders of China / Oriental Pied hornbill (Anthracoceros albirostris) male bringing berry to nest, Tongbiguan Nature Reserve, Dehong Prefecture, Yunnan Province, China, April.

Michael Quinton / Northern Hawk Owl (Surnia ulula) male bringing Northern Red-backed Vole (Clethrionomys rutilus) prey to incubating female, Alaska

Jeff Foott / Pika, (Ochotona princeps) bringing vegetation to Hay pile, in Bridger National Forest, Wyoming, USA, July.

Dave Bevan / Pair of Garden warblers (Sylvia borin) bringing dry grass for nest building to nest site, Carmarthenshire, Wales, UK, May.

Dave Bevan / Pair of Garden warblers (Sylvia borin) bringing dry grass for nest building to nest site, Carmarthenshire, Wales, UK, May.

Dave Bevan / Male Robin (Erithacus rubecula) bringing food to female at nest who feeds chicks, Carmarthenshire, Wales, UK, May.

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) male feeding female in courtship ritual, Saxony-Anhalt, Germany

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) male feeding female in courtship ritual, Saxony-Anhalt, Germany

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) feeding chick in nest cavity, Saxony, Germany

Markus Varesvuo / Peregrine falcon (Falco peregrinus) male bringing courtship gift to female, Canada, January.

Markus Varesvuo / Peregrine falcon (Falco peregrinus) male bringing courtship gift to female, Canada, January.

Markus Varesvuo / Peregrine falcon (Falco peregrinus) male bringing courtship gift to female, Canada, January.

Markus Varesvuo / Peregrine falcon (Falco peregrinus) male bringing courtship gift to female, Canada, January.

Kim Taylor / Barn Swallow (Hirundo rustica) bringing food to the nest. Surrey, England, UK.

Kim Taylor / Barn Swallow (Hirundo rustica) bringing food to the nest. Surrey, England, Digital composite

Donald M. Jones / Common Loon (Gavia immer) parent bringing food to chick, Troy, Montana

Yashpal Rathore / Blue-tailed bee-eater (Merops philippinus) male bringing insect for female as courtship offering. Near Ranganathittu Bird Sanctuary, Karnataka, India.

Yashpal Rathore / Blue-tailed bee-eater (Merops philippinus) male bringing insect for female as courtship offering. Near Ranganathittu Bird Sanctuary, Karnataka, India.

Yashpal Rathore / Blue-tailed bee-eater (Merops philippinus) male bringing insect for female as nuptial offering. Near Ranganathittu Bird Sanctuary, Karnataka, India.

Yashpal Rathore / Blue-tailed bee-eater (Merops philippinus) male bringing insect for female as nuptial offering. Near Ranganathittu Bird Sanctuary, Karnataka, India.

Laurie Campbell / Puffin (Fratercula arctica) bringing sand eels to feed young, Staple Island, Farne Islands, Northumberland, England, June

Philippe Clement / Male Kittiwake (Rissa tridactyla) bringing food to female on nest, Fowlsheugh RSPB Reserve, Aberdeenshire, Scotland, UK, May

Philippe Clement / Great tit (Parus major) bringing food to nestbox to feed chicks, Belgium, April.

Philippe Clement / Great tit (Parus major) bringing food to nestbox to feed chicks, leaves with fecal sac, Belgium, April.

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) with food for chick at nest cavity, Saxony-Anhalt, Germany

Graeme Guy/ BIA / Oriental Pied-Hornbill (Anthracoceros albirostris) male bringing food to nest cavity, Singapore

Thomas Hinsche/ BIA / Eurasian Hoopoe (Upupa epops) parent feeding chick in nest cavity, Saxony, Germany

Guy Edwardes / Northern gannet (Morus bassanus) bringing nesting material to its partner, Great Saltee Island, County Wexford, Republic of Ireland, June., June.

Guy Edwardes / Northern gannet (Morus bassanus) bringing nesting material to its partner, Great Saltee Island, County Wexford, Republic of Ireland, June., June.

Eric Baccega / Keeper bringing back Giant panda (Ailuropoda melanoleuca) baby age 3 months to its mother Huan Huan. Beauval Zoo, France, 1st November 2017.

Eric Baccega / Keeper bringing back Giant panda (Ailuropoda melanoleuca) baby age 3 months to its mother Huan Huan. Beauval Zoo, France, October 2017.

Tony Heald / Yellow-billed stork (Mycteria ibis) bringing in nesting material, Chobe National Park, Botswana, May.

Tony Heald / Yellow-billed stork (Mycteria ibis) bringing in nesting material, Chobe National Park, Botswana, May.

Jeff Foott / Pika (Ochotona princeps) bringing vegetation to hay pile, in Bridger National Forest, Wyoming, USA, August.

Dave Bevan / Slow motion clip of a pair of Willow warblers (Phylloscopus trochilus) bringing food to chicks in nest in grass and brambles, Carmarthenshire, UK, June.

Tui De Roy / Galapagos Hawk (Buteo galapagoensis) parent feeding sea turtle hatchling to chicks in nest, Sullivan Bay, Santiago Island, Galapagos Islands, Ecuador

Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider prey (Misumena vatia) to feed chicks, Monmouthshire, Wales, UK. May.

Phil Savoie / Blackbird (Turdus merula) sign, bringing Earthworm (Lumbricus terrestris) prey to nest, Monmouthshire, Wales UK, May.

Phil Savoie / Blackbird (Turdus merula) sign, bringing Earthworm (Lumbricus terrestris) prey to nest, Monmouthshire, Wales UK, May.

Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider prey (Misumena vatia) to feed chicks, Monmouthshire, Wales, UK. May.

Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider prey (Misumena vatia) to feed chicks, Monmouthshire, Wales, UK. May.

Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider prey (Misumena vatia) to feed chicks, Monmouthshire, Wales, UK. May.

Dave Bevan / Great tit (Parus major) bringing moss for nest building to nest box, Carmarthenshire, Wales, UK, June.

Frederique Olivier / Adelie penguin (Pygoscelis adeliae) taking rocks from an abandoned nest and bringing them to its own, Adelie Land, Antarctica, January.

Frederique Olivier / Adelie penguin (Pygoscelis adeliae) taking rocks from an abandoned nest and bringing them to its own, Adelie Land, Antarctica, January.

Dave Bevan / Pair of Pied wagtails (Motacilla alba) bringing food to nest in the eaves of a building, Carmarthenshire, Wales, UK. April.

Dave Bevan / Pair of Pied wagtails (Motacilla alba) bringing food to nest in the eaves of a building, Carmarthenshire, Wales, UK. April.