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.
Sangay Shrew-opossum
Caenolestes sangay
Calaça's White-tailed Mouse
Calassomys apicalis
Yellow Golden Mole
Calcochloris obtusirostris
Blond Titi
Callicebus barbarabrownae
Coimbra-Filho's Titi
Callicebus coimbrai
Southern Bahian Titi
Callicebus melanochir
Black-fronted Titi
Callicebus nigrifrons
Masked Titi
Callicebus personatus
Goeldi's Monkey
Callimico goeldii
Painted Tree-rat
Callistomys pictus
Buffy-tufted-ear Marmoset
Callithrix aurita
Buffy-headed Marmoset
Callithrix flaviceps
Geoffroy's Tufted-ear Marmoset
Callithrix geoffroyi
Common Marmoset
Callithrix jacchus
Wied's Marmoset
Callithrix kuhlii
Black-tufted-ear Marmoset
Callithrix penicillata
Northern Fur Seal
Callorhinus ursinus
Ear-spot Squirrel
Callosciurus adamsi
Kinabalu Squirrel
Callosciurus baluensis
Northern Gray-bellied Squirrel
Callosciurus caniceps
Southern Gray-bellied Squirrel
Callosciurus concolor
Pallas's Squirrel
Callosciurus erythraeus
Finlayson's Squirrel
Callosciurus finlaysonii
Hon Khoai Squirrel
Callosciurus honkhoaiensis
Inornate Squirrel
Callosciurus inornatus
Mentawai Squirrel
Callosciurus melanogaster
Black-striped Squirrel
Callosciurus nigrovittatus
Plantain Squirrel
Callosciurus notatus
Borneo Black-banded Squirrel
Callosciurus orestes
Phayre's Squirrel
Callosciurus phayrei
Prevost's Squirrel
Callosciurus prevostii
Irrawaddy Squirrel
Callosciurus pygerythrus
Anderson's Squirrel
Callosciurus quinquestriatus
Common Golden-mantled Ground Squirrel
Callospermophilus lateralis
Sierra Madre Ground Squirrel
Callospermophilus madrensis
Cascade Golden-mantled Ground Squirrel
Callospermophilus saturatus
Arequipa Vesper Mouse
Calomys achaku
Bolivian Vesper Mouse
Calomys boliviae
Crafty Vesper Mouse
Calomys callidus
Large Vesper Mouse
Calomys callosus
Cerqueira's Vesper Mouse
Calomys cerqueirai
Coastal Vesper Mouse
Calomys chinchilico
Rejected Vesper Mouse
Calomys expulsus
Fecund Vesper Mouse
Calomys fecundus
Long-tailed Vesper Mouse
Calomys frida
Hummelinck's Vesper Mouse
Calomys hummelincki
Small Vesper Mouse
Calomys laucha
Andean Vesper Mouse
Calomys lepidus
Mattevi's Vesper Mouse
Calomys mattevii
Short-tailed Vesper Mouse
Calomys miurus
Drylands Vesper Mouse
Calomys musculinus
Peruvian Vesper Mouse
Calomys sorella
Delicate Vesper Mouse
Calomys tener
Tocantins Vesper Mouse
Calomys tocantinsi
Córdoba Vesper Mouse
Calomys venustus
Zagros Mountains Brush-tailed Mouse
Calomyscus bailwardi
Pakistan Brush-tailed Mouse
Calomyscus baluchi
Behzad's Brush-tailed Mouse
Calomyscus behzadi
Darvish's Brush-tailed Mouse
Calomyscus darvishi
Goodwin's Brush-tailed Mouse
Calomyscus elburzensis