Species
What is a species?
A species is a group of organisms that can interbreed and produce healthy offspring which can themselves breed. Wolves and dogs can produce fertile puppies, so they are both the same species (Canis lupus), but mules are usually sterile so horses and donkeys are different species. Asexual species, such as hydras, are defined by their body shape, as are many fossil species, which - being dead - obviously can't breed with anything any more.
All species
- Aardvark
- Adelie penguin
- African buffalo
- African bush elephant
- African fish eagle
- African wild dog
- Amazonian manatee
- American black vulture
- Amethystine python
- Andean condor
- Andean hillstar
- Antarctic fur seal
- Arctic ground squirrel
- Arctic skua
- Argali sheep
- Army ant
- Asian elephant
- Atlantic sailfish
- Aye-aye
- Bactrian camel
- Badger
- Baikal seal
- Bald uakari
- Banded demoiselle
- Banded sea krait
- Bar-headed goose
- Barnacle goose
- Black Rhinoceros
- Black bear
- Black mamba
- Black-banded sea krait
- Black-crested gibbon
- Black-footed rock-wallaby
- Blackbird
- Blue whale
- Blue wildebeest
- Bornean orangutan
- Brants's whistling rat
- Broadley's flat lizard
- Brown basilisk
- Brown bear
- Brown fur seal
- Brown trout
- Brown-throated sloth
- Brush-tailed rock wallaby
- Buff-necked ibis
- Burrowing owl
- Burrowing parrot
- Cape gannet
- Capercaillie
- Capybara
- Cheetah
- Chimpanzee
- Chinese alligator
- Chinese giant salamander
- Chinstrap penguin
- Clark's grebe
- Common blossom bat
- Common bottlenose dolphin
- Common crossbill
- Common toad
- Common wasp
- Common woolly monkey
- Crabeater seal
- Crest-tailed mulgara
- Crowned eagle
- Dall sheep
- Damaraland mole rat
- Darwin's frog
- Demoiselle crane
- Desert locust
- Doria's Tree-Kangaroo
- Dormouse
- Dugong
- Eastern Gorilla
- Eastern grey kangaroo
- Eleonora's falcon
- Emperor penguin
- Ethiopian wolf
- Eurasian eagle owl
- European honey bee
- Field vole
- Forest elephant
- François' langur
- Frilled lizard
- Galápagos fur seal
- Galápagos giant tortoise
- Galápagos land iguana
- Galápagos petrel
- Gelada baboon
- Giant anteater
- Giant cuttlefish
- Giant panda
- Giant river otter
- Giant river turtle
- Giant tube worm
- Giraffe
- Golden eagle
- Golden snub-nosed monkey
- Gopher tortoise
- Grass snake
- Great crested newt
- Great diving beetle
- Great spotted woodpecker
- Great white shark
- Greater bulldog bat
- Greater flamingo
- Grey seal
- Grey whale
- Grey wolf
- Guanaco
- Hare
- Harlequin ladybird
- Hedgehog
- Herring gull
- High brown fritillary
- Himalayan jumping spider
- Hippopotamus
- Honey buzzard
- Humboldt penguin
- Humpback whale
- Indri
- Jaguar
- Japanese giant salamander
- Kakapo
- Kea
- Kestrel
- Killer whale
- King bird of paradise
- King penguin
- Kingfisher
- Kittiwake
- Knot
- Koala
- Komodo dragon
- Lammergeier
- Large blue butterfly
- Leafy sea dragon
- Leopard
- Leopard seal
- Lesser black-backed gull
- Lesser flamingo
- Lion
- Little bent-wing bat
- Little corella
- Long-eared hedgehog
- Macaroni penguin
- Magellanic penguin
- Magellanic woodpecker
- Magnificent frigatebird
- Malayan colugo
- Malleefowl
- Mandarin duck
- Maned wolf
- Manta ray
- Marine iguana
- Markhor
- Marvellous spatuletail
- Matschie's tree-kangaroo
- Meerkat
- Milu
- Monarch butterfly
- Mongolian gazelle
- Mountain hare
- Musk ox
- Nile crocodile
- North Island brown kiwi
- North Pacific giant octopus
- Nubian ibex
- Olive baboon
- Olive ridley turtles
- Ostrich
- Otter
- Pantropical spotted dolphin
- Patagonian mara
- Peale's dolphin
- Peregrine falcon
- Peruvian anchoveta
- Pheasant
- Pied kingfisher
- Pirarucu
- Plateau pika
- Platypus
- Polar bear
- Polecat
- Pompeii worm
- Puma
- Purple emperor butterfly
- Purple sea urchin
- Raccoon
- Raggiana bird of paradise
- Red deer
- Red fox
- Red kangaroo
- Red kite
- Red panda
- Red squirrel
- Red-billed quelea
- Red-billed tropicbird
- Red-crowned crane
- Reindeer
- Ringnecked parakeet
- Robin
- Rook
- Rufous elephant shrew
- Saiga
- Sand goanna
- Sand martin
- Scottish wood ant
- Sea otter
- Serval
- Short-eared owl
- Siberian crane
- Siberian salamander
- Six-wired bird of paradise
- Slow worm
- Snares crested penguin
- Snow goose
- Snow leopard
- Snow petrel
- Socotra cormorant
- South American coati
- South American grey fox
- South polar skua
- Southern Elephant Seal
- Southern carmine bee-eater
- Southern sea lion
- Southern three-banded armadillo
- Sparrowhawk
- Spectacled bear
- Spotted python
- Springbok
- Star-nosed mole
- Starling
- Stoat
- Storm petrel
- Straw-coloured fruit bat
- Striped Skunk
- Sunflower star
- Superb bird of paradise
- Superb lyrebird
- Swallow
- Tambaqui
- Tasmanian devil
- Tawny owl
- Temminck's tragopan
- Texas blind salamander
- Thorny devil
- Tibetan fox
- Tibetan spring snake
- Tiger
- Tiger quoll
- Tiger shark
- Tisza mayfly
- Venezuela pebble toad
- Verreaux's sifaka
- Vogelkop bowerbird
- Walia ibex
- Walrus
- Wandering albatross
- Waved albatross
- Weddell seal
- Weedy sea dragon
- Western gorilla
- Western red colobus
- Whale shark
- White rhinoceros
- White-fronted bee-eater
- White-tailed sea eagle
- Whooper swan
- Wire-tailed manakin
- Wood stork
- Yacare caiman
- Yellow anaconda
- Yellow meadow ant
- Yellow-bellied glider
- Yunnan snub-nosed monkey
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