Nick Upton / Harvest mouse (Micromys minutus) cleaning its nose on Common hogweed (Heracleum sphondylium) flowerhead after release, Moulton, Northampton, UK, June.

Nick Upton / White-lipped snail (Cepaea hortensis) crawling over an oak sleeper retaining a garden lawn with a greenhouse in the background, Wiltshire, UK, April.

Nick Upton / Three Marbled white butterflies (Melanargia galathea) nectaring on Greater knapweed flowers (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, UK, June.

Nick Upton / Close-up of a Meadow brown butterfly (Maniola jurtina) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Nick Upton / Marbled white butterflies (Melanargia galathea) nectaring on a clump of Greater knapweed flowers (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Nick Upton / Marbled white butterflies (Melanargia galathea) nectaring on a clump of Greater knapweed flowers (Centaurea scabiosa) in a chalk grassland meadow, Wiltshire, England, UK, June.

Nick Upton / Six-spot burnet moth (Zygaena filipendulae), Marbled white butterflies (Melanargia galathea) and a Dark green fritillary (Argynnis aglaja) nectaring on a clump of Greater knapweed flowers (Centaurea s...

Nick Upton / Male Thick-legged flower beetle (Oedemera nobilis), with a Pyramidal orchid (Anacamptis pyramidalis) pollinium attached to its head, nectaring on Common hogweed flowers (Heracleum sphondylium), Wiltsh...

Nick Upton / Two Dark green fritillary butterflies (Argynnis aglaja) and a Narrow-bordered five-spot burnet moth (Zygaena lonicerae) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland...

Nick Upton / Juvenile Goldenrod spider (Misumena vatia) camouflaged on a Common hogweed (Heracleum sphondylium) flowerhead, reacting to and catching a fly (Muscidae), Wiltshire, England, UK, June.

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...

Nick Upton / View towards Naranjo de Bulnes (Picu Urriellu) a distinctive 2519m limestone peak, Picos de Europa mountains, viewed from Arenas de Cabrales at sunset, Asturias, Spain, August 2016.

Nick Upton / Mediterranean sea holly / Pyrenean eryngo (Eryngium bourgatii) flowering on montane pastureland, Covadonga, Picos de Europa, Asturias, Spain, August.

Nick Upton / Pyrenean merendera / False meadow saffron (Merendera pyrenaica / Colchicum montanum) flowering on montane pastureland, Vegas de Sotres, Picos de Europa, Asturias, Spain, August.

Nick Upton / Cornish heath (Erica vagans) clump flowering on montane pastureland, above the Lakes of Covadonga, at 1300m, Picos de Europa, Asturias, Spain, August.

Nick Upton / Red mason bees (Osmia bicornis) entering and leaving nest hole drilled into a log within an insect hotel, Gloucestershire, England, UK, April.

Nick Upton / Ivy bee (Colletes hederae) mating ball, showing a mass of males clustered around a female recently emerged from her burrow, Wiltshire, England, UK, September.

Nick Upton / Two Red fox (Vulpes vulpes) cubs playing near the entrance to their den at dusk, Somerset, England, UK, May.

Nick Upton / European eel (Anguilla anguilla) elver migrating upstream, using an eel pass on the side of a weir, Somerset Levels, England, UK, July.

Nick Upton / Male Eurasian beaver (Castor fiber) grazing at dusk, River Otter, Devon, England, UK, June.

Nick Upton / Tilt shot of a dam constructed by Eurasian beavers (Castor fiber) on a section of the River Otter, Devon, England, UK, June 2018.

Nick Upton / Forest caterpillar hunter (Calosoma sycophanta) feeding on a Gypsy moth caterpillar (Lymantria dispar) it has killed in a Holm oak tree, Bacu Goloritze ravine, Baunei, Sardinia, Italy, May.

Nick Upton / Sand-loving / Square-headed wasp (Tachysphex costae) feeding on Sea holly flowers (Eryngium maritimum) on a beach, Sardinia, Italy, June.

Nick Upton / Feral horse (Equus caballus) walking on a remote sandy beach, near Arta, Mallorca, Spain, August.

Nick Upton / Female House spider (Tegenaria sp.) at the mouth of her tubular silk retreat in an old stone wall, Somerset, UK, September.

Nick Upton / Running foliage spider / Spiny-legged sac spider (Liocranum rupicola), a nationally scarce species in the UK, hunting at night in an old stone wall, Wiltshire, UK, September.

Nick Upton / Common lace weaver / Lace-webbed spider (Amaurobius similis) male in its web in an old stone wall at night, Wiltshire, UK, September.

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...

Nick Upton / Common swifts (Apus apus) flying overhead, Wiltshire, UK, June. Digital composite image.

Nick Upton / Pine Marten (Martes martes) foraging at night in mixed coniferous and birch woodland in the area where live traps were set for a reintroduction project to Wales by the Vincent Wildlife Trust, Scottish...

Nick Upton / Pine marten (Martes martes) male standing on a feeding table in a soft release cage after arrival from Scotland, during a reintroduction project by the Vincent Wildlife Trust, Cambrian Mountains, Wale...

Nick Upton / Common swift (Apus apus) feeding chick in a nest box, filmed using infrared light, Cambridge, England, UK, August.

Nick Upton / Eurasian beaver (Castor fiber) adding a branch to its dam, Tayside, Scotland, UK, May. Filmed at night using a remote camera and infra red light.

Nick Upton / Female Eurasian beaver (Castor fiber) and five kits feeding on a Willow (Salix) sapling, River Otter, Devon, England, UK, July. Part of Devon Wildlife Trust's Devon Beaver Trial.

Nick Upton / Rescued Grey seal pup (Halichoerus grypus) in a convalescence pool where it will be kept until strong enough to be released back to the sea, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January.

Nick Upton / Blind adult male Grey seal (Halichoerus grypus) 'Marlin' waving a flipper at the edge of a convalescence pool where he is a long-term resident, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January. Mo...

Nick Upton / Adult female Common / Harbour seal (Phoca vitulina) 'Sija' waving a flipper in a pool where she is a long-term resident, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January.