Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) with a GPS tracker on its back in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Nick Upton / White stork (Ciconia ciconia) parent standing beside its three developing chicks. In captive breeding colony raising young birds for UK White Stork reintroduction project at the Knepp Estate. Cotswold...

Nick Upton / White stork (Ciconia ciconia) nest at captive breeding colony raising chicks for UK White Stork reintroduction project at the Knepp Estate. Cotswold Wildlife Park, Oxfordshire, UK, May 2019.

Nick Upton / Richard Wardle feeding fish to recently hatched White stork (Ciconia ciconia) chicks in nest. In captive breeding colony raising young birds for UK White Stork reintroduction project at the Knepp Esta...

Nick Upton / Recently hatched White stork (Ciconia ciconia) chicks begging for food in their nest. In captive breeding colony raising young birds for UK White Stork reintroduction project at the Knepp Estate. Cots...

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

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) pair mating on their nest at sunset, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White storks nesting in the UK for several hundreds of y...

Nick Upton / White stork (Ciconia ciconia) pair performing an up-down display with bill clattering on their nest in an Oak tree, Knepp estate, Sussex, UK, April 2019. This is the first recorded instance of White s...

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...

Guy Edwardes / Saddle-billed stork (Ephippiorhynchus senegalensis), Moremi Game Reserve, Botswana.

Markus Varesvuo / Black stork (Ciconia nigra) catching a fish, Hungary May

Markus Varesvuo / Black stork (Ciconia nigra) Hungary May

Neil Aldridge / Yellow-billed stork (Mycteria ibis) catching a young barbel or catfish in the shallows of the Chobe River, Chobe National Park, Botswana.

Michel Poinsignon / Black stork (Ciconia nigra) reflected in water, Pusztaszer, Hungary, April

Anup Shah / Marabou storks (Leptoptilos crumeniferus) feeding on catfish in waterhole, wide angle view. Maasai Mara National Reserve, Kenya.

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.

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.

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

Florian Möllers / White stork (Ciconia ciconia) adult portrait, captive, Vogelpark Marlow, Germany, May.

Florian Möllers / White stork (Ciconia ciconia) adult portrait, captive, Vogelpark Marlow, Germany, May.

Denis-Huot,Denis-Huot / Marabou stork (Leptoptilos crumeniferus) with a turtle prey, Masai-Mara Game Reserve, Kenya

Felicity Lanchester,Felicity Lanchester / Mixed group of Cattle egrets (Bubulcus ibis), Great egrets (Ardea alba), African openbill storks (Anastomus lamelligerus) and Sacred ibis (Threskiornis aethiopicus) gathering to roost, Selous Game Res...

Neil Aldridge / White-backed vultures (Gyps africanus) fighting while feeding at a carcass of a young wildebeest with Ruppell's vultures (Gyps rueppelli) and Marabou storks (Leptoptilos crumenifer), Maasai Mara Natio...

Neil Aldridge / Ruppell's vultures (Gyps rueppelli) and White-backed vultures (Gyps africanus) feeding on a carcass of a young wildebeest, Maasai Mara National Reserve, Kenya, September. Both Ruppell's vulture and th...

Neil Aldridge / Marabou stork (Leptoptilos crumenifer) feeding on a wildebeest carcass, Maasai Mara National Reserve, Kenya, September.

Neil Aldridge / Marabou stork (Leptoptilos crumenifer) feeding on a wildebeest carcass, Maasai Mara National Reserve, Kenya, September.

Neil Aldridge / Marabou storks (Leptoptilos crumenifer) fighting at a carcass, Maasai Mara National Reserve, Kenya, September.

Pal Hermansen / Stork (Ciconia ciconia) pair mating. Poland. April.

Pal Hermansen / Stork (Ciconia ciconia) pair mating. Poland. April.

Pal Hermansen / RF - Stork (Ciconia ciconia) in flight, near Biebrza National Park, Poland. April. (This image may be licensed either as rights managed or royalty free.)

Patricio Robles Gil / Painted stork (Mycteria leucocephala), Bharatpur Bird Sanctuary, India.

David Perpinan / Plumbeous ibis (Theristicus caerulescens) Pantanal, Mato Grosso do Sul, Brazil,

Robin Chittenden / Asian openbill (Anastomus oscitans) perched, Sri Lanka.

Robin Chittenden / Lesser adjutant (Leptoptilos javanicus) on ground, Sri Lanka.

Franco Banfi / Asian openbill (Anastomus oscitans) looking for prey. Yala National Park, Southern Province, Sri Lanka.

Franco Banfi / Painted stork (Mycteria leucocephala) inside a small lake. Yala National Park, Southern Province, Sri Lanka.

David Woodfall / White stork (Ciconia ciconia) at nest, first White storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

David Woodfall / White stork (Ciconia ciconia) pair at nest, first White storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

David Woodfall / White stork (Ciconia ciconia) perched near nest, first White storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

David Woodfall / White storks (Ciconia ciconia) near nest. First White storks to nest in UK for 600 years .Part of a rewilding / reintroduction scheme at large lowland farm in southern England . June 2020

David Woodfall / White stork (Ciconia ciconia) at nest, first White storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

David Woodfall / White stork (Ciconia ciconia) in flight . First White storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

David Woodfall / White stork (Ciconia ciconia) pair at nest, first white storks to nest in the UK for 600 years. Part of reintroduction project, Knepp Farm, Sussex, England, UK. June 2020

Will Watson / Flooded main gate and sign for Lake Nakuru National Park with Marabou storks (Leptoptilos crumeniferus) and dying Fever Trees (Vachellia xanthophloea) due to flooding caused by climate change, Kenya....

Doug Wechsler / Wood stork (Mycteria americana) in flight, St. Augustine Alligator Farm Zoological Park, Florida, USA.