Mammals of the WorldMammals of the World: A Photo Database of Every Mammal Species
Mammals are far more diverse than most people realize. Scientists currently recognize roughly 6,871 living species, grouped into about 27 orders and 167 families — from bats (Chiroptera) and rodents (Rodentia), the two largest orders by far, to small, specialized groups like pangolins (Pholidota) and aardvarks (Tubulidentata). Each family shares a distinct evolutionary history, from whales and dolphins (Cetacea) to primates, carnivores, and marsupials, and new species are still being described every year.
This site exists to build a free, open, photo-referenced database of that diversity. We're using it as the reference library for a mammal identification field guide app — the more species that have verified photos attached, the better that app can recognize mammals from a photo in the field. Browse the full species list below, search by common name, scientific name, order, family, or genus, and if you have a photo of a mammal you've encountered, upload it to help fill in the gaps.
Bougainville Monkey-faced Fruit Bat
Pteralopex anceps
Guadalcanal Monkey-faced Fruit Bat
Pteralopex atrata
Greater Monkey-faced Fruit Bat
Pteralopex flanneryi
Montane Monkey-faced Fruit Bat
Pteralopex pulchra
New Georgia Monkey-faced Fruit Bat
Pteralopex taki
Japanese Flying Squirrel
Pteromys momonga
Siberian Flying Squirrel
Pteromys volans
Smoky Flying Squirrel
Pteromyscus pulverulentus
Amazonian Common Mustached Bat
Pteronotus alitonus
Davy's Naked-backed Bat
Pteronotus davyi
Thomas's Naked-backed Bat
Pteronotus fulvus
Allen's Common Mustached Bat
Pteronotus fuscus
Big Naked-backed Bat
Pteronotus gymnonotus
Macleay's Mustached Bat
Pteronotus macleayii
Mesoamerican Common Mustached Bat
Pteronotus mesoamericanus
Mexican Common Mustached Bat
Pteronotus mexicanus
Paraguana Common Mustached Bat
Pteronotus paraguanensis
Parnell's Common Mustached Bat
Pteronotus parnellii
Wagner's Lesser Mustached Bat
Pteronotus personatus
Puerto Rican Common Mustached Bat
Pteronotus portoricensis
Dobson's Lesser Mustached Bat
Pteronotus psilotis
Hispaniolan Common Mustached Bat
Pteronotus pusillus
Sooty Mustached Bat
Pteronotus quadridens
Wagner's Common Mustached Bat
Pteronotus rubiginosus
Giant Otter
Pteronura brasiliensis
Admiralty Flying Fox
Pteropus admiralitatum
Aldabra Flying Fox
Pteropus aldabrensis
Black Flying Fox
Pteropus alecto
Small Samoan Flying Fox
Pteropus allenorum
Vanuatu Flying Fox
Pteropus anetianus
Aru Flying Fox
Pteropus aruensis
Percy Island Flying Fox
Pteropus brunneus
North Moluccan Flying Fox
Pteropus caniceps
New Britain Masked Flying Fox
Pteropus capistratus
South Moluccan Flying Fox
Pteropus chrysoproctus
Makira Flying Fox
Pteropus cognatus
Comoros Flying Fox
Pteropus comorensis
Spectacled Flying Fox
Pteropus conspicillatus
Large Samoan Flying Fox
Pteropus coxi
Ryukyu Flying Fox
Pteropus dasymallus
New Ireland Masked Flying Fox
Pteropus ennisae
Nicobar Flying Fox
Pteropus faunulus
Banks Flying Fox
Pteropus fundatus
Gilliards' Flying Fox
Pteropus gilliardi
Wallacean Gray Flying Fox
Pteropus griseus
Ontong Java Flying Fox
Pteropus howensis
Island Flying Fox
Pteropus hypomelanus
Andersen's Flying Fox
Pteropus intermedius
Kai Flying Fox
Pteropus keyensis
Livingstone's Flying Fox
Pteropus livingstonii
Lombok Flying Fox
Pteropus lombocensis
Lyle's Flying Fox
Pteropus lylei
Big-eared Flying Fox
Pteropus macrotis
Sanborn's Flying Fox
Pteropus mahaganus
Marianas Flying Fox
Pteropus mariannus
Indian Flying Fox
Pteropus medius
Black-bearded Flying Fox
Pteropus melanopogon
Black-eared Flying Fox
Pteropus melanotus
Pohnpei Flying Fox
Pteropus molossinus
Great Flying Fox
Pteropus neohibernicus