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...

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

Markus Varesvuo / Black stork (Ciconia nigra) Hungary May

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

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.

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.

Eric Baccega / White stork (Ciconia ciconia), preening on nest Alsace, France, May

Ernie Janes / White Stork (Ciconia ciconia) in flight over city buildings. Marakesh, Morocco, March.

Edwin Giesbers / Breeding pair of White Stork (Ciconia ciconia) on nest. The Netherlands, April.

Edwin Giesbers / White Stork (Ciconia ciconia) on nest, silhouetted against stormy sky. The Netherlands, April.

Edwin Giesbers / Two White Stork (Ciconia ciconia) standing in snow. The Netherlands, January.

Edwin Giesbers / Legs of a White Stork (Ciconia ciconia) on ice. The Netherlands, January.

Edwin Giesbers / White Stork (Ciconia ciconia) in snow. The Netherlands, January.

Wild Wonders of Europe / Widstra / Two White storks (Ciconia ciconia) one landing in tree, La Serena, Extremadura, Spain, March 2009

Wild Wonders of Europe / Hamblin / White stork (Ciconia ciconia) pair at nest on old chimney, Rusne, Nemunas Regional Park, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / White stork (Ciconia ciconia) pair before mating at nest site on old chimney, Rusne, Nemunas Regional Park, Lithuania, June 2009

Wild Wonders of Europe / Damschen / Black stork (Ciconia nigra) landing in water, Elbe Biosphere Reserve, Lower Saxony, Germany, August 2008

Wild Wonders of Europe / Damschen / Black stork (Ciconia nigra) just after landing, Elbe Biosphere Reserve, Lower Saxony, Germany, August 2008

Wild Wonders of Europe / Damschen / Black stork (Ciconia nigra) just after landing in river, Elbe Biosphere Reserve, Lower Saxony, Germany, August 2008

Wild Wonders of Europe / Quinta / White Stork (Ciconia ciconia) pair at nest on coastal rock formation, Cabo Sardão (Cape) Alentejo, Natural Park of South West Alentejano and Costa Vicentina, Portugal, June 2009 WWE BOOK

Wild Wonders of Europe / Máté / White stork (Ciconia ciconia) chicks by parent, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Mate / Two White stork (Ciconia ciconia) chicks in nest, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / White stork (Ciconia ciconia) portrait, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / Grey heron (Ardea cinerea) and a Black stork (Ciconia nigra) in water, Fisher pond, Prypiat area, Belarus, June 2009

Wild Wonders of Europe / Máté / Black stork (Ciconia nigra) fishing, Fisher pond, Prypiat area, Belarus, June 2009

Wild Wonders of Europe / della Ferrera / White storks (Ciconia ciconia) nesting on roof, Cigoc village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / White stork (Ciconia ciconia) by nest on barn roof, Cigoc village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / White stork (Ciconia ciconia) pair on nest, Jasenovac village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / White stork (Ciconia ciconia) throwing Earthworm (Lumbricus sp) into air before feeding, Near Drenov Bok village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Cr...

Wild Wonders of Europe / Oxford / White stork (Ciconia ciconia) pair on nest, wetland reserve, Doñana National & Natural Park, Huelva Province, Andalusia, Spain, May 2009

Wild Wonders of Europe / Máté / White stork (Ciconia ciconia) feeding three chicks, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / Two White stork (Ciconia ciconia) chicks, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / Two White stork (Ciconia Ciconia) chicks, one calling, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / White stork (Ciconia ciconia) portrait, Prypiat area, Turov, Belarus, June 2009

Wild Wonders of Europe / Máté / White stork (Ciconia ciconia) chicks in nest, Prypiat area, Turov, Belarus, June 2009