Andean fox, 19th century
Argentine fox, 19th century
Darwin's fox, 19th century
Andean goose, 19th century
Jaguarundi, 19th century
Pampas cat, 19th century
Scale-throated earthcreeper, 19th century
Falkland Islands wolf, 19th century
Leaf-nosed bat, 19th century
Common vampire bat, 19th century
Dusky dolphin, 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
Galapagos and South American lizards, 19th century
South American frogs, 19th century
Darwin's rhea, 19th century
Alpaca, 19th century
Andean condor, 19th Century illustration
Galapagos short-eared owl, 19th century
Galapagos barn owl, 19th century
South American freshwater fish, 19th century
Aplochiton freshwater fish, 19th century
Darwin on sexual selection in birds, 1871
Galapagos land iguana, 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
Galapagos dove, 19th century
Galapagos hawk, 19th century
Moles and mole rats, 19th century
Clingfishes and pipefish, 19th century
South American tree frogs, 19th century
South American tree iguanas, 19th century
South American coastal fish, 19th century
Scelidotherium prehistoric mammal fossils, 19th century
Pyrenean brown bear, 19th century
Fennec fox, sloth bear and elephant seal, 19th century
Mountain degu, illustration
Ocelot, 19th century
Galapagos gurnard, 19th century
Player scorpionfish, 19th century
Poacher fish and pigfish, 19th century
Narrow-headed pufferfish, 19th century
Darwin on sexual selection in primates, 1871
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
Megatherium prehistoric mammal fossils, 19th century
Megatherium prehistoric mammal fossil, 19th century
Vampire bat, Zoology of the Beagle
Graomys mouse, Zoology of the Beagle
Geoffroy's wild cat, illustration
Eoraptor dinosaur, illustration
Carnotaurus dinosaur, illustration
Lagosuchus dinosaur, illustration
Golden mole, 19th Century illustration
Leopard, 19th Century illustration
Spotted hyena, 19th Century illustration
Hyena, 19th Century illustration
Weasel, 19th Century illustration
European polecat, 19th century
Greater grison, 19th century
American mink, 19th century
European mole, 19th century
Striped hyena, 19th century
Paraceratherium prehistoric mammal, illustration
Uintatherium prehistoric mammal, illustration
Snow leopard, 19th century
Bengal tiger, 19th century
Leopard, 19th century
Sable, 19th century
Large Indian civet, 19th century
Common genet, 19th century
Prehistoric amphicyonid bear-dog, illustration
Indarctos prehistoric bear, illustration
Prehistoric and modern mammal vertebrae, 19th century
Megalonyx prehistoric mammal fossil, 19th century
Maned wolf and binturong, 19th century
Phorusrhacos prehistoric bird
Brown bear, 19th century
Cave lion, illustration
Brazilian tuco-tuco, illustration
Chapalmalania prehistoric raccoon
Arctotherium extinct short-faced bear, illustration
Fennec fox, illustration
Megaraptor dinosaur, illustration
Pterosaur flying reptile fishing technique, illustration
Aucasaurus dinosaur, illustration
Mesosaurus prehistoric marine reptile, illustration
Piatnitzkysaurus dinosaur, illustration
Andrewsarchus preying on Embolotherium, illustration
Golden jackal, 19th Century illustration
Lion, 19th Century illustration
Tiger, 19th Century illustration
Striped hyena, 19th Century illustration
Sabretooth cats and mammoth prey, illustration
Miocene of North America, illustration
Ceratosaurus head, illustration
Baryonyx walkerii dinosaur, illustration
Tyrannosaurus rex hunting, illustration
Feathered Dromaeosaurus dinosaur, illustration
Marine dinosaurs, illustration
Dilophosaurus dinosaur, illustration
Barosaurus dinosaurs, illustration
Ornithocheirus pterosaurs, illustration
Mosasaurus reptile eating fish, illustration
Archaeornithomimus dinosaur, illustration
Ceratosaurus dinosaur, illustration
Compsognathus dinosaur, illustration
Prognathodon attacking a Megalodon, illustration
Phorusrhacos prehistoric birds attacking prey, illustration
Kinkajou, 19th Century illustration
Cebid monkey, 19th century
Western tragopan, illustration
Darwin finch, Zoology of the Beagle
1839 Darwin's Falkland Island Fox Extinct
Darwin on embryonic development, 1871
Staurikosaurus dinosaur, illustration
Repenomamus prehistoric mammal, illustration
Osteoborus prehistoric canines
Dinictis prehistoric cat, illustration
Northern bald ibis, 19th Century illustration
Carcharodontosaurus, illustration
Albertosaurus and Parasaurolophus
Tyrannosaurus rex, illustration
Cretaceous dinosaurs, illustration
Batrachia frogs, 1904 illustration
Madagascan flying fox, 19th century
Polar bear, 19th Century illustration
Brown bear, 19th Century illustration
Ekaltadeta prehistoric rat-kangaroo
Senegalese lion, 19th century
Birds flying near a tree on a Traditional American Indian pattern
Llama, 19th Century illustration
Armadillo, 19th Century illustration
Peccary, 19th Century illustration
Opossums, 19th Century illustration
Greater bulldog bat, 19th Century illustration
Jaguar hunting its prey in the Amazon, 19th century
Thalassocnus aquatic sloth, illustration
Prosauropod and theropod dinosaurs, illustration
Sarcosuchus and Ouranosaurus reptiles, illustration
Albertosaurus dinosaur, illustration
Eurhinosaurus ichthyosaur, illustration
Polycotylus plesiosaur, illustration
Pterosaur flying reptile skimming, illustration
Pterodactyl flying reptile, illustration
Mesozoic landscape and dinosaurs, illustration
Ceratosaurus dinosaur and Apatosaur herd, illustration
Brachiosaur and ceratosaur dinosaurs, illustration
Dimetrodon, illustration
Nanuqsaurus size comparison, illustration
Torvosaurus size comparison, illustration
Velociraptor attacking protoceratops
Albertosaurus dinosaur sleeping, illustration
Pterodactyl flying reptile hunting prey, illustration
Tarbosaurus dinosaur, illustration
Pterosaur and skimmer fishing techniques, illustration
Monolophosaurus dinosaurs mating
Pachyrhinosaurus and theropod fighting
Dromaeosauruses attacking, illustration