Chick foot resembling a human hand
Mutant fruit fly larvae, light micrograph
Mutant fruit fly, SEM
Mutant mice
Natural history specimens, 18th century
Alien insect hybrid, X-ray
Mutant fruit fly
Sparrow chick skin, light micrograph
Buzzard, X-ray
Feathers, X-ray
Bengal florican
Great crested grebe
Montagu's harrier, artwork
Short-toed treecreeper, artwork
Little grebe, artwork
Nightingale, artwork
Cetti's warbler, artwork
Reed warbler, artwork
Common magpie, artwork
Common reed bunting, artwork
Kentish plover, artwork
European bee-eater, artwork
Streaked fantail warbler, artwork
Corn bunting, artwork
Sparrowhawk, artwork
European honey buzzard, artwork
Red-legged partridge, artwork.
Common wood pigeon, artwork
Turtle dove, artwork
Common cuckoo, artwork
Nightjar, artwork
Great spotted woodpecker, artwork
Woodlark, artwork
Crag martin. Artwork
Grey wagtail, artwork
White-throated dipper, artwork
Wren calling, artwork
Blackbird, artwork
Eurasian blackcap, artwork
Common whitethroat, artwork
Dartford warbler, artwork
Subalpine warbler, artwork
Chiffchaff, artwork
Firecrest, artwork
Eurasian nuthatch, artwork
Coal tit, artwork
Long-tailed tit, artwork
Crested tit, artwork
Great tit, artwork
Blue tit, artwork
Golden oriole, artwork
Eurasian jay, artwork
European starling, artwork
House sparrow, artwork
Chaffinch, artwork
Rock bunting, artwork
Greenfinch, artwork
Alpine accentor, artwork
Female snow bunting
Albino royal python
Two-headed sheep
Bird on azalea branch, X-ray
Robin feather
House martin heart, light micrograph
Lilac-breasted roller in flight
Lilac-breasted roller perching on twig
Lilac-breasted roller perching on stump
Rainbow lorikeet
Treecreeper, X-ray
Sparrowhawk, X-ray
Long-eared owl, X-ray
Goldcrest on a branch, X-ray
Ring-necked dove, X-ray
Sparrowhawk head, X-ray
Ruppell's vulture
Speagull, X-ray
Parakeets, coloured X-ray
Peregrine falcon skeleton
Male mandarin duck
Great spotted woodpeckers, artwork
European goldfinch, 19th century artwork
Domestic pigeon
Penguins mating, artwork
Bird reproductive organs, artwork
Eurasian blackcaps, artwork
Eurasian eagle owl, artwork
European shag, artwork
Great cormorant, artwork
White wagtail, artwork
African stonechat, artwork
Eurasian penduline tit, artwork
Green woodpecker, artwork
Northern goshawk, artwork
Short-toed eagle and prey, artwork
Short-toed eagle, artwork
Common buzzard, artwork
Peregrine falcon, artwork
Common kestrel, artwork
Scops owl, artwork
Barn owl, artwork
Tawny owl, artwork
Long-eared owl, artwork
European robin, artwork
Song thrush, artwork
Carrion crow, artwork
Common raven, artwork
Wheatear, artwork
Eurasian woodcock, artwork
Black woodpecker, artwork
Bonelli's eagle, artwork
Common kingfisher fishing, artwork
Grey heron fishing, artwork
Bird migration, artwork
Coot and irises, X-ray
Duck and flowers, X-ray
Sulawesi red-knobbed hornbill
European badger, X-ray
Frogs on leaves, X-ray
Artificial meat, conceptual image
Glass frog
Peacock feather close up
Eastern brown snake
Preserved three-toed amphiuma
Preserved greater siren
Ocellated lizard, artwork
Viperine water snake, artwork
Fire salamander, artwork
Spanish pond turtle, artwork
Moorish gecko, artwork
Western green lizard, artwork
Iberian wall lizard, artwork
Slow worm, artwork
Aesculapian snake, artwork
Southern smooth snake, artwork
Grass snake, artwork
Asp viper, artwork
Insect and plant leaves, X-ray
Peacock feather
Barn swallow, artwork
European goldfinch, artwork
Woodpecker, X-ray
Rod of Asclepius, conceptual X-ray
Stilt wader bird, X-ray
Quail brain, light micrograph
Greater ani
Yellow-browed tody-flycatcher
Mammal brain on film, X-ray
Lizards, X-ray
Lizard on giant hogweed, X-ray
Lizard, illustration
Domestic cat, illustration
Philippine flying lemur, illustration
Leaf-nosed fruit bat, illustration
House gecko
Strawberry poison-dart frogs
Strawberry poison-dart frog
Weasel, X-ray
Pool frog, X-ray
Lizard, X-ray
Indian python, X-ray
Veiled chameleon, X-ray
Spiny-tailed monitor, X-ray
Mouse in a willow tree, X-ray
Squirrels on a branch, X-ray
Flying dragon, X-ray
Python, X-ray
Three tadpoles
Red-necked wallaby with leaf in mouth
Thick-tailed bushbaby
Esmeralda's robber frog
Elegant stubfoot toad
Developing tadpoles
Developing tadpole
Striped royal python
Dumeril's boa
Montpellier snake, artwork
Common midwife toad and eggs, artwork