Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) regurgitating food, before the chick falls onto its back, parent tries to help, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) in nest with a one-week-old chick nestled under its breast plumage moving round, Casares, Andalusia, Spain, March.

Simon Littlejohn / Female American mink (Neogale vison) entering a Kingfisher (Alcedo atthias) nest and taking a chick, Stour River, Dorset, UK, July.

Simon Littlejohn / Common kingfisher (Alcedo atthis) perched outside its nest, opening its wings and beak in an aggressive display to a Common blackbird (Turdus merula) which eventually flies away, River Stour, Dorset,...

Simon Littlejohn / Grey heron (Ardea cinerea) standing on rivers edge in heavy rain, swallowing a small Pike (Esox lucius),River Stour, Dorset, UK, September.

Simon Littlejohn / Adult female European otter (Lutra lutra) standing with its pup (approximately 14 weeks old) on the edge of the river, the pup raises its front paws onto mum's neck and the female then heads into the...

Simon Littlejohn / Adult female European otter (Lutra lutra) guarding and grooming its pup on riverbank as it eats a fish, River Stour, Dorset, UK, September.

Simon Littlejohn / European otter (Lutra lutra) pup standing on small island of vegetation in the middle of the river, awaiting the return of its mother, the female appears behind the pup who then slips into the water t...

Simon Littlejohn / Two European otters (Lutra lutra) hunting in the River Stour, Dorset, England, UK, May.

Simon Littlejohn / Juvenile Lammergeier vulture (Gypaetus barbatus) in flight, mobbed by a raven, Grand Bargy cirque, Haute Savoie, France, October.

Simon Littlejohn / Bonelli's eagle chicks (Aquila fasciata) in nest pecking each other, aged one week, Andalusia , Spain, May.

Simon Littlejohn / Pair of Griffon vultures (Gyps fulvus) mating, Andalusia, Spain, June.

Simon Littlejohn / Honey bee (Apis) nectaring from a flowering Eucalyptus tree, Andalusia, Spain, June.

Simon Littlejohn / Female Patagonian puma (Puma concolor patagonia) feeding on a Guanaco (Lama guanacoe) carcass, Torres del Paine National Park, Patagonia, Chile, July.

Simon Littlejohn / Female Patagonian puma (Puma concolor patagonica) dragging the carcass of a young Guanaco (Lama guanicoe), Torres del Paine National Park, Patagonia, Chile, July.

Simon Littlejohn / Close-up of a female Patagonian puma (Puma concolor patagonica) feeding on a Guanaco (Lama guanicoe) carcass, filmed with a remote camera, Torres del Paine National Park, Patagonia, Chile, May.

Simon Littlejohn / Flock of Griffon vultures (Gyps fulvus) feeding, Andalusia, Spain, May.

Simon Littlejohn / Griffon vulture (Gyps fulvus) regurgitating food for its chick, chick struggles to eat, Andalusia, Spain, June.

Simon Littlejohn / Mute swans (Cygnus olor) hissing and lunging at a European otter (Lutra lutra), River Stour, Dorset, England, UK, June.

Simon Littlejohn / Family of European otters (Lutra lutra) feeding and playing amongst Whitewater crowfoot (Ranunculus aquatilis) flowers, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Close-up of a female European otter (Lutra lutra) and two juveniles feeding in a river, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Female European otter (Lutra lutra) and two large pups playing and feeding in mid river, River Stour, Dorset, England, UK, June.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) two month old chick begging to be fed with adult attempting to regurgitate a meal but nothing materialises, Manilva, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) two month old chick begging to be fed, but adult is picking up small bits of nesting material and offering it up to the chicks instead, Manilva, Andalusia, Spain...

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) parent leaving the nest leaving its chick to rest, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) parent lands on nest alongside chick, before extending its neck and hissing at its mate to move it on, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) parent with its two month old chick, before the chick shelters behind the adult, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing on an abandoned nest picking up nesting material, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick panting and repositioning itself to regulate body temperature in the direct sunlight, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick panting to try and cool down in the direct sunlight, before repositioning in the nest, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick preening its down, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) adult arriving at the nest with chick in it, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick overheating in the nest, panting to try and cool down before falling asleep, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick overheating in the nest, panting to try and cool down, Casares, Andalusia, Spain, May.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) chick falling asleep on the nest, Casares, Andalusia, Spain, May.

Simon Littlejohn / Pair of Rooks (Corvus frugilegus) standing in nest displaying bonding behaviour, then taking off, Wimborne, Dorset, April.

Simon Littlejohn / Pair of Rooks (Corvus frugilegus) engaging in courtship behaviour, hopping through the tree branches and touching beaks, Wimborne, Dorset, April.

Simon Littlejohn / Rook (Corvus frugilegus) tending to nest as its mate sits on branch close by, Wimborne, Dorset, April.

Simon Littlejohn / Rook (Corvus frugilegus) hopping through branches to sit on nest in tree, Wimborne, Dorset, April.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing in nest with 4-5 day old chick shuffling around under its breast plumage, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing in nest whilst preening itself, then lowers its head to feed chick before settling down to cover it, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing in nest with chick under its breast plumage, before popping out briefly, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) adult standing in nest with young chick preening itself before stretching up to beg for food, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) adult standing over its chick whilst gently feeding it, Casares, Andalusia, Spain, March.

Simon Littlejohn / Wide shot of Eurasian griffon vulture (Gyps fulvus) standing on edge of nest in heavy rain, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) sitting in nest with very young chick under her breast and popping up briefly to beg for food, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing on edge of nest drying out its wings after heavy rainfall, Casares, Andalusia, Spain, March.

Simon Littlejohn / Eurasian griffon vulture (Gyps fulvus) standing on edge of nest drying out its wings after heavy rainfall, Casares, Andalusia, Spain, March.