Galapagos land iguana, 19th century
Galapagos and South American lizards, 19th century
Galapagos dove, 19th century
Galapagos gurnard, 19th century
Large ground finch, 19th century
Medium ground finch, 19th century
Small tree finch, 19th century
Large tree finch, 19th century
Vegetarian finch, 19th century
Common cactus finch, 19th century
Green warbler-finch, 19th century
Clingfishes and pipefish, 19th century
Galapagos hawk, 19th century
Galapagos short-eared owl, 19th century
Galapagos barn owl, 19th century
South American tree frogs, 19th century
South American tree iguanas, 19th century
Dusky dolphin, 19th century
South American frogs, 19th century
Leaf-nosed bat, 19th century
Common vampire bat, 19th century
Darwin's fox, 19th century
Argentine fox, 19th century
Jaguarundi, 19th century
Pampas cat, 19th century
South American rodents, 19th century
Long-haired grass mouse, 19th century
Waterhouse's swamp rat, 19th century
Brazilian marsh rat, 19th century
Southern big-eared mouse
Darwin's leaf-eared mouse, 19th century
Bird pulling a worm from a tree trunk, illustration
Player scorpionfish, 19th century
Poacher fish and pigfish, 19th century
South American freshwater fish, 19th century
Aplochiton freshwater fish, 19th century
Narrow-headed pufferfish, 19th century
South American coastal fish, 19th century
Darwin on sexual selection in primates, 1871
Falkland Islands wolf, 19th century
Ornithosuchus prehistoric reptile
End of the dinosaurs, illustration
Scale-throated earthcreeper, 19th century
Darwin's rhea, 19th century
Andean fox, 19th century
Giant tortoise, illustration
Ring-tailed iguana, 19th century artwork
Iguana, lizard and skink, 19th century
Andean goose, 19th century
Darwin on sexual selection in birds, 1871
Frill-necked lizard, 19th century
Darwin on embryonic development, 1871
Vampire bat, Zoology of the Beagle
Graomys mouse, Zoology of the Beagle
Lohuecotitan dinosaurs laying eggs, illustration
Dinosaur sizes comparison, illustration
Marine iguana, artwork
Horned, polychrotid and anole lizards, 19th century
Naja cobra and colubrid snake, 19th century
Illuminated calligraphic manuscript, 16th century
Darwin on pigeon evolution, illustration
Green sea turtle, 19th century
Tortoises, 19th century
Lyriocephalus lizard, 19th century
Giant leaf-tailed gecko, 19th century
Veiled chameleon, 19th century
Common gliding lizard, 19th century
Ocellated lizard, 19th century
Porte cree lizard, 19th century
Sandfish, 19th century
Phrynosoma horned lizard, 19th century
Salamander and snail, 19th century
Fire salamander, 19th century
Emerald tree boa, 19th century
Longtail whip lizard, 19th century
Monocled cobra, 19th century
Grass snake, 19th century
European asp, 19th century
Fer-de-lance, 19th century
Horned desert viper, 19th century
Slow worm, 19th century
Green vine snake, 19th century
Common basilisk, 19th century
Mamenchisaurus dinosaur, illustration
Pentaceratops dinosaur, illustration
Psittacosaurus dinosaur, illustration
Tyrannosaurus rex dinosaur, illustration
Sinoceratops female dinosaur, illustration
Sinoceratops male dinosaur, illustration
Sinoceratops baby dinosaur, illustration
Yinlong dinosaur, illustration
Triceratops dinosaur, illustration
Darwin finch, Zoology of the Beagle
Giant brown frog with webbed feet, illustration
Orangutan, hooded serpent and ape, 18th century illustration
Iguana and green lizard, illustration
Iguanodon, illustration
Short and long tailed pterodactyle, illustration
Ichthyosaur and Plesiosaur, illustration
Horned dinosaur, illustration
Tiger and crocodile, 19th century
Brazilian marmosets, 17th century
Tegu and iguanid lizards, 19th century
Scelidotherium prehistoric mammal fossils, 19th century
Basilisk and skink lizards, 19th century
Dimetrodon, illustration
Allosaurus attacking a Stegosaurus dinosaur, illustration
Prehistoric crocodile attacking its prey, illustration
Banded rattlesnake, 19th century
Boa constrictor, 19th century
Cassowary, 19th Century illustration
Orangutan skeleton, 19th century
Crowned pigeon, 19th Century illustration
Eurhinosaurus ichthyosaur, illustration
Polycotylus plesiosaur, illustration
Snapping turtles, 19th century
Pterosaur and skimmer fishing techniques, illustration
Batrachia frogs, 1904 illustration
Snakes and lizards, 19th century
Chameleon on branch, illustration
Bear skeleton, 18th century
Arthropods in Hooke's Micrographia (1665)
Haeckel on the Evolutionary History of Man, 1877
Durer's Rhinoceros, 1515
Kiwi, 19th century illustration
King bird-of-paradise, 19th century illustration
Wilson's bird-of-paradise, 19th century illustration
Arfak astrapia, 19th century illustration
Labrador duck, 19th century illustration
Magnificent bird-of-paradise, 19th century illustration
Elliot's bird-of-paradise, 19th century illustration
Superb bird-of-paradise, 19th century illustration
Extinct birds, illustration
Monkey skeleton, 18th century
Cebid monkey, 19th century
Fruit bat, 19th Century illustration
Greater bulldog bat, 19th Century illustration
Lion, 19th Century illustration
Dalmatian pelican, 19th Century illustration
Great argus, 19th Century illustration
Ostrich, 19th Century illustration
Potto, 19th century
Madagascan flying fox, 19th century
Common toad, 19th century
Green frog and tree frog, 19th century
Scelidosaurus dinosaur, illustration
Magnificent frigatebird, artwork
Snake, 18th century artwork
Repenomamus prehistoric mammal, illustration
Grass snake, 19th Century illustration
Water monitor, 19th Century illustration
Plateosaurus dinosaur, illustration
Prehistoric reptiles, illustration
Gracilisuchus prehistoric crocodile
Boa constrictor, illustration
Horned viper, illustration
Coral snake, 19th Century illustration
Cobra, 19th Century illustration
Ichthyosaurus and Plesiosaurus, 19th-century illustration
The Elephant's Child, illustration
The Beginning of the Armadillos, illustration
Cotylorhynchus synapsids, illustration
Magpie and dinosaur foot, illustration
Nile crocodile and baby, 19th century
Prehistoric giant tortoise, illustration
Malayan tapir, 19th century
Toxodon prehistoric mammal fossil skull, 19th century
Toxodon prehistoric mammal fossils, 19th century
Macrauchenia prehistoric mammal fossils, 19th century
Macrauchenia prehistoric mammal fossil femurs, 19th century
Ground sloth prehistoric mammal fossil teeth, 19th century
Mylodon prehistoric mammal fossil teeth, 19th century
Ground sloth prehistoric mammal fossils, 19th century
Megalonyx prehistoric mammal fossil, 19th century
Megatherium prehistoric mammal fossils, 19th century
Megatherium prehistoric mammal fossil, 19th century
Rattlesnake entrails, historical artwork
Rattlesnake stomach, historical artwork
Rattlesnake tail, historical artwork
Spanish psammodromus, illustration
D'Orbigny's slider, 19th century illustration