David Perpinan / Tracking shot of a male Pheasant (Phasianus colchicus) displaying to an unreceptive female, Barcelona, Spain, May.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Group of Griffon vultures (Gyps fulvus) fighting to feed on a dead lamb. Cuenca, Spain, August.

David Perpinan / Group of Griffon vultures (Gyps fulvus) arriving and feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Grey heron (Ardea cinerea) chick trying to force its parent to regurgitate food, Barcelona, Spain, May.

David Perpinan / Grey heron (Ardea cinerea) chick trying to force its parent to regurgitate food, with another chick leaning in, chased away by adult, Barcelona, Spain, May.

David Perpinan / Grey heron (Ardea cinerea) regurgitating a fish for its chick, Barcelona, Spain, May.

David Perpinan / Aeroplane flying in front of a total lunar eclipse, also called a Blood Moon, Barcelona, Spain, 27th July 2018.

David Perpinan / Mallards (Anas platyrhynchos) paddling in river, seen from underwater, Scotland, UK, April.

David Perpinan / Male Lapwing (Vanellus vanellus) arriving at nest to incubate eggs, female leaves, Scottish Borders, Scotland, UK, June.

David Perpinan / Two Hyacinth macaws (Anodorynchus hyacinthus) in a tree, Pantanal, Mato Grosso do Sul, Brazil.

David Perpinan / Blue-fronted amazon parrot (Amazona aestiva) entering nest in tree, Pantanal, Mato Grosso do Sul, Brazil.

David Perpinan / Great rufous woodcreeper (Xiphocolaptes major) arriving at nest site in a dead palm tree, climbs down to nest, Pantanal, Mato Grosso do Sul, Brazil.

David Perpinan / Close-up of a Giant anteater (Myrmecophaga tridactyla) eating ants, Pantanal, Mato Grosso do Sul, Brazil.

David Perpinan / Rhea (Rhea americana) incubating eggs, gets up and turns one over, Pantanal, Mato Grosso do Sul, Brazil.

David Perpinan / Various Songbirds (Passerine) in cages, confiscated from illegal wildlife trade, Brazil.

David Perpinan / Blue fronted amazon (Amazona aestiva) chicks, confiscated from illegal wildlife trade, Brazil.

David Perpinan / Close-up of a carer feeding a Blue fronted amazon (Amazona aestiva), confiscated from illegal wildlife trade, Brazil.

David Perpinan / Slow motion clip of a Wasp spider (Argiope bruennichi) wrapping a grasshopper in silk, Cuenca, Castile-La Mancha, Spain, August.

David Perpinan / Common rock sparrow (Petronia petronia) feeding chicks in nest, filmed using an infra-red camera, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Common rock sparrow (Petronia petronia) chick exploring outside nest, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Adult Common rock sparrow (Petronia petronia) feeding chicks, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Female Rock sparrow (Petronia petronia) feeding chick inside nest, filmed with an infrared camera, Spain, June.

David Perpinan / Oystercatcher (Haematopus ostralegus) incubating eggs on nest, alarm calling as a predator flies overhead, Scotland,UK, June.

David Perpinan / Rock sparrow (Petronia petronia) feeding chick outside nest, Spain, June.

David Perpinan / Slow motion clip of an Alpine swift (Tachymarptis melba) leaving nest site in a building, Barcelona, Spain, July.

David Perpinan / Two Alpine swifts (Tachymarptis melba) examining potential nest site in a building, Barcelona, Spain, July.

David Perpinan / Alpine swift (Tachymarptis melba) entering nest site in a building to feed chicks, Barcelona, Spain, July.

David Perpinan / Tracking shot of a male Pheasant (Phasianus colchicus) walking, Barcelona, Spain, May.

David Perpinan / Male Parsley frog (Pelodytes punctatus) calling in a pond, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling under a lilypad, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Pair of Mediterranean tree frogs (Hyla meridionalis) in amplexus on ground, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Pair of Mediterranean tree frogs (Hyla meridionalis) in amplexus, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Pair of Mediterranean tree frogs (Hyla meridionalis) in amplexus, Barcelona, Spain, May. Filmed at night with an infrared camera.

David Perpinan / Griffon vulture (Gyps fulvus) feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Griffon vulture (Gyps fulvus) feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Griffon vulture (Gyps fulvus) feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Griffon vulture (Gyps fulvus) feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Two Griffon vultures (Gyps fulvus) feeding on the remains of a dead lamb, Cuenca, Spain, August.

David Perpinan / Griffon vulture (Gyps fulvus) feeding on a dead lamb, Cuenca, Spain, August.

David Perpinan / Slow motion wide angle shot of a Grey heron (Ardea cinerea) feeding chicks in an urban heronry, Barcelona, Spain, May.

David Perpinan / Slow motion wide angle shot of a Grey heron (Ardea cinerea) arriving at an urban heronry, Barcelona, Spain, May.