Flip de Nooyer / Common Vole (Microtus arvalis) adult peering from burrow, Europe

Jan Vermeer / European Tree Frog (Hyla arborea) hanging on plant, Europe

Konrad Wothe / Brown Bear (Ursus arctos) climbing tree, Europe

Konrad Wothe / Blue Tit (Cyanistes caeruleus) parent delivering caterpillar to chicks in nest, Europe

Flip de Nooyer / Common Eider (Somateria mollissima) adult female at down nest with eggs, Europe

Flip de Nooyer / European River Otter (Lutra lutra) resting on riverbank, Europe

Duncan Usher / Common Kingfisher (Alcedo atthis) flying with fish in beak, Europe

Duncan Usher / Eurasian Red Squirrel (Sciurus vulgaris) portrait on moss and fungus-covered tree stump, Europe

Duncan Usher / Red Fox (Vulpes vulpes) next to cars at night, Europe

Mathias Schaef / Cream-colored Courser (Cursorius cursor), Europe

Mathias Schaef / Osprey (Pandion haliaetus) carrying stick for nesting, Europe

Mathias Schaef / Osprey (Pandion haliaetus) landing at nest, Europe

Cyril Ruoso / Brown-breasted Hedgehog (Erinaceus europaeus) in its nest amid tree roots, Europe

Roland Seitre / European Hornet (Vespa crabro) group on nest, Europe

Roland Seitre / European Hornet (Vespa crabro) group on nest, Europe

Roland Seitre / European Hornet (Vespa crabro) worker emerging from brood cell near pupa, Europe

Roland Seitre / European Hornet (Vespa crabro) group tending to nest, Europe

Roland Seitre / European Hornet (Vespa crabro) queen and workers, Europe

Konrad Wothe / European Pond Turtle (Emys orbicularis) breathing, Europe

Konrad Wothe / Caspian Pond Turtle (Mauremys rivulata) on lily pad, Europe

Konrad Wothe / European Goldfinch (Carduelis carduelis) drinking, Europe

Konrad Wothe / European Goldfinch (Carduelis carduelis) at water's edge, Europe

Konrad Wothe / House Sparrow (Passer domesticus) with moth prey, Europe

Konrad Wothe / Common House Martin (Delichon urbicum) collecting clay for nest building, Europe

Konrad Wothe / House Sparrow (Passer domesticus) drinking, Europe

Konrad Wothe / Common House Martin (Delichon urbicum) collecting clay for nest building, Europe

Konrad Wothe / Brown Bear (Ursus arctos), Europe

Ingo Arndt / Common Starling (Sturnus vulgaris) flock flying in formation to confuse hunting Peregrine Falcon (Falco peregrinus), Europe

Ingo Arndt / Common Starling (Sturnus vulgaris) flock flying in formation to confuse hunting Peregrine Falcon (Falco peregrinus), Europe

Ingo Arndt / Common Starling (Sturnus vulgaris) flock flying in formation to confuse hunting Peregrine Falcon (Falco peregrinus), Europe

Ingo Arndt / Peregrine Falcon (Falco peregrinus) hunting Common Starling (Sturnus vulgaris) flock, Europe

Ingo Arndt / Thick-tailed Scorpion (Buthidae) mother carrying her young, Europe

Ingo Arndt / Thick-tailed Scorpion (Tityus sp) mother carrying her young, Europe

Ingo Arndt / Thick-tailed Scorpion (Buthidae) mother carrying her young, Europe

Ingo Arndt / Thick-tailed Scorpion (Buthidae) mother carrying her young, Europe

Konrad Wothe / Raccoon (Procyon lotor) on shore, Europe

Konrad Wothe / Golden Ground Beetle (Carabus auratus), Europe

Albert Lleal / Firebrat (Thermobia domestica) individual, Europe

Albert Lleal / European Mantid (Mantis religiosa) pair mating, Europe

Albert Lleal / Paper Wasp (Polistes gallicus) on nest, Europe

Silvia Reiche / Goldenrod Crab Spider (Misumena vatia) with eggs on flower, Europe

Silvia Reiche / Goldenrod Crab Spider (Misumena vatia) with eggs on flower, Europe

Ingo Arndt / Brown China-mark (Elophila nymphaeata) butterfly and its reflection, Europe

Ingo Arndt / Garden Tiger (Arctia caja) moth on flower, Europe

Ingo Arndt / Mourning Cloak (Nymphalis antiopa) butterfly, Europe

Ingo Arndt / Peacock Butterfly (Inachis io), displaying false eyespots, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) eating, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) on branch, Europe

Ingo Arndt / Red Admiral (Vanessa atalanta) butterfly, Europe

Ingo Arndt / Hornet Moth (Sesia apiformis), a hornet mimic, Europe

Ingo Arndt / Hornet Moth (Sesia apiformis), a hornet mimic, Europe

Ingo Arndt / Hornet Moth (Sesia apiformis), a hornet mimic, Europe

Ingo Arndt / Hornet Moth (Sesia apiformis), a hornet mimick, Europe

Ingo Arndt / Small Tortoiseshell (Aglais urticae) butterfly, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) resting on branch, Europe

Ingo Arndt / Peacock Butterfly (Inachis io), showing false eyespots, Europe

Ingo Arndt / Oldworld Swallowtail (Papilio machaon) butterfly on flower, Europe

Ingo Arndt / Oldworld Swallowtail (Papilio machaon) butterfly on flower, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) portrait, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) biting cone, Europe

Ingo Arndt / Small Tortoiseshell (Aglais urticae) butterfly on flowers, Europe

Ingo Arndt / Small Elephant Hawk Moth (Deilephila porcellus) at night, Europe

Ingo Arndt / Peppered Moth (Biston betularia) camouflaged on tree bark, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) eating nut, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) leaping from tree trunk with nut in its mouth, Europe

Ingo Arndt / Peacock Butterfly (Inachis io) on flower, displaying false eyespots, Europe

Ingo Arndt / Small Tortoiseshell (Aglais urticae) butterfly on flower, Europe

Ingo Arndt / Hornet Moth (Sesia apiformis) pair, hornet mimics, Europe

Ingo Arndt / Eurasian Red Squirrel (Sciurus vulgaris) eating nut, Europe

Ingo Arndt / Winter Moth (Operophtera brumata) killed by another insect, Europe

Ingo Arndt / Winter Moth (Operophtera brumata), Europe

Ingo Arndt / Winter Moth (Operophtera brumata) emerging from pupa, Europe

Ingo Arndt / Painted Lady (Vanessa cardui) butterfly, Europe

Ingo Arndt / Burnet Moth (Zygaena carniolica) pair, Europe

Ingo Arndt / Giant Peacock Moth (Saturnia pyri) with false eyespots, Europe

Ingo Arndt / Giant Peacock Moth (Saturnia pyri) portrait, Europe

Ingo Arndt / Giant Peacock Moth (Saturnia pyri) antenna, Europe

Ingo Arndt / Wasp on fruit, Europe

Ingo Arndt / Wasp on apple, Europe

Ingo Arndt / Brimstone (Gonepteryx rhamni) butterfly on snow-covered branch, Europe

Duncan Usher / Eurasian Red Squirrel (Sciurus vulgaris) feeding from the vantage point of tree stump, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) eating grass, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) male with tagged ear, Swiss Alps, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) male, Swiss Alps, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) male with Swiss Alps in background, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) male pair with Swiss Alps in background, Europe

Konrad Wothe / Alpine Ibex (Capra ibex) male with Swiss Alps in background, Europe

Konrad Wothe / Domestic Cat (Felis catus) adult, climbing tree, Europe

Konrad Wothe / Domestic Cat (Felis catus) adult, climbing tree, Europe

Konrad Wothe / Domestic Cat (Felis catus) kitten with veterinarian, Germany

Konrad Wothe / Domestic Cat (Felis catus) adult resting, Europe

Michael Durham / Brown Rat (Rattus norvegicus) detail of incisor teeth, native to Europe, introduced worldwide

Flip de Nooyer / Ruff (Philomachus pugnax) competing courting males on lek, Europe

Flip de Nooyer / Ruff (Philomachus pugnax) adult displaying during courtship, Europe

Flip de Nooyer / Ruff (Philomachus pugnax) adult displaying with white feathers, Europe

Flip de Nooyer / Western Roe Deer (Capreolus capreolus) adult looking back over its shoulder, Europe