Whiskered and natterer's bats, illustration
Syngnathid fish, illustration
Ant castes, illustration
Slender ant and shining guest ant, illustration
Giant panda, illustration
Cretaceous herbivorous dinosaurs
Southern red wood ant and shining guest ant, illustration
Rabbit anatomy, 19th Century illustration
Chicken anatomy, 19th Century illustration
Bobcat skull, illustration
Biological classification, illustration
Pere David's deer, illustration
Bobcat, illustration
Location of pelvis part of chimpanzee skeleton, illustration
Pterosaurs, giraffe and human, illustration
Dinosaur heads compared, illustration
Horse musculature, illustration
Pileated woodpecker, illustration
Giant salamander, 19th century illustration
Mouse anatomy, illustration
Green lizard anatomy, 19th Century illustration
Woodspecker skull with hyoid, illustration
Axis deer, illustration
Bactrian camel, illustration
Barasingha deer, illustration
White-tailed deer (Odocoileus virginianus), illustration
Dog skin, illustration
Giant pandas, illustration
Tiger, artwork
Dog heart, illustration
Dog liver, illustration
Dog lymphatic system, illustration
Pig, illustration
Dolphin, illustration
Elephant, illustration
Elephant skeleton, illustration
Horse anatomy, illustration
Equine skeletal system, illustration
Fallow deer, illustration
Muntjac deer, illustration
Otter eating brown trout, illustration
Tick life-cycle, illustration
Three-toed sloth, illustration
Right whale, 19th century
Sex determination of newborn mice, illustration
Mouse male reproductive system, illustration
Tiger, illustration
Common genet, illustration
European badger, illustration
Viverridae mammals, illustration
Wildcats, illustration
Five cervidae mammals, illustration
Four antelopes, illustration
Marsupialia mammals, illustration
Lemuridae mammals, illustration
Primates, illustration
Monkey hanging from a tree by its tail, illustration
Lemur, marmoset and baboon, 19th century
Peregrine falcon, illustration
Sectioned frog heart, illustration
Treecreeper (Certhia familiaris), illustration
Tawny Fish Owl, artwork
Two woodpigeons, artwork
Pair of Spermophila birds, artwork
Two blue bird-of-paradise birds, artwork
Short-toed treecreeper, 19th Century illustration
Yellow-billed oxpecker, 19th Century illustration
Northern bald ibis, 19th Century illustration
Jackdaw, 19th Century illustration
Pheasant, 19th Century illustration
Golden-headed manakin, 19th Century illustration
Hazel grouse, 19th Century illustration
Turtle dove, 19th Century illustration
Hummingbird, 19th Century illustration
Blue wood pigeon, 19th Century illustration
Madagascan blue pigeon, 19th Century illustration
Balicassiao (Dicrurus balicassius), 19th C illustration
Ortolan, 19th Century illustration
Green pigeon, 19th Century illustration
Dove, 19th Century illustration
Red hazel grouse, 19th Century illustration
Bird of paradise, 19th Century illustration
Birds of Senegal, 19th Century illustration
Collared sunbird, 19th Century illustration
Perdrix perdrix, 19th Century illustration
White-crowned pigeon, 19th Century illustration
Tanager, 19th Century illustration
Hummingbirds, 19th Century illustration
Francolin, 19th Century illustration
Blue jay, illustration
Pallid Swift, artwork
European robin, artwork
Australian estrildid finches, artwork
Long-tailed tits on hawthorn blossom, illustration
Robin (Erithacus rubecula), illustration
Seagull in flight, illustration
Seagull wing, illustration
American flamingo, illustration
Black-winged stilt, illustration
Common redshank, illustration
Little egret, illustration
Grey heron, illustration
Hoopoe, illustration
Primate evolution, conceptual artwork
Eurohippus and modern horse, artwork
Plateosaurus and school bus, illustration
Pentaceratops and school bus, illustration
Mamenchisaurus and school bus, illustration
Torvosaurus and school bus, illustration
Cetiosaurus and school bus, illustration
Kentrosaurus and school bus, illustration
Spanish psammodromus, illustration
Rabbit jumping over tortoise, illustration
Birds, ciconiiformes family, illustration
Gruiformes birds, illustration
Blue tit, illustration
Doedicurus prehistoric mammal
Bird next to human hand, illustration
Fly and moth genetic code, illustration
Thick-tailed opossum, artwork
Neotraginae mammals, illustration
Fox paw, illustration
Dog skeleton, illustration
Chinese water deer, illustration
Cave lion, illustration
Archaeopteryx and a magpie, illustration
Dog spleen, illustration
Dog arteries, illustration
Dog veins, illustration
Highland cow, illustration
Devon cow, illustration