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.
Richardson's Ground Squirrel
Urocitellus richardsonii
Townsend's Ground Squirrel
Urocitellus townsendii
Long-tailed Ground Squirrel
Urocitellus undulatus
Washington Ground Squirrel
Urocitellus washingtoni
Satunin's Tibetan Hamster
Urocricetus kamensis
Ladakh Tibetan Hamster
Urocricetus lama
Northern Gray Fox
Urocyon cinereoargenteus
Island Fox
Urocyon littoralis
Baker's Tent-making Bat
Uroderma bakeri
Common Tent-making Bat
Uroderma bilobatum
Pacific Tent-making Bat
Uroderma convexum
Davis's Tent-making Bat
Uroderma davisi
Brown Tent-making Bat
Uroderma magnirostrum
Black-tailed Giant Rat
Uromys anak
Biak Island Giant Rat
Uromys boeadii
White-tailed Giant Rat
Uromys caudimaculatus
Emma's Giant Rat
Uromys emmae
Masked White-tailed Giant Rat
Uromys hadrourus
Emperor Giant Rat
Uromys imperator
New Britain Island Giant Rat
Uromys neobrittanicus
Guadalcanal Giant Rat
Uromys porculus
King Giant Rat
Uromys rex
Great Key Island Giant Rat
Uromys siebersi
Vangunu Giant Rat
Uromys vika
Equivalent-teeth Shrew Mole
Uropsilus aequodonenia
Anderson's Shrew Mole
Uropsilus andersoni
Black-backed Shrew Mole
Uropsilus atronates
Dabie Mountains Shrew Mole
Uropsilus dabieshanensis
Fansipan Shrew Mole
Uropsilus fansipanensis
Funiushan Shrew Mole
Uropsilus funiushanensis
Gracile Shrew Mole
Uropsilus gracilis
Huangang Shrew Mole
Uropsilus huanggangensis
Inquisitive Shrew Mole
Uropsilus investigator
Snow Mountain Shrew Mole
Uropsilus nivatus
Chinese Shrew Mole
Uropsilus soricipes
Japanese Shrew Mole
Urotrichus talpoides
American Black Bear
Ursus americanus
Brown Bear
Ursus arctos
Polar Bear
Ursus maritimus
Asian Black Bear
Ursus thibetanus
Small Indian Mongoose
Urva auropunctata
Short-tailed Mongoose
Urva brachyurus
Indian Gray Mongoose
Urva edwardsii
Indian Brown Mongoose
Urva fusca
Javan Mongoose
Urva javanica
Collared Mongoose
Urva semitorquata
Ruddy Mongoose
Urva smithii
Crab-eating Mongoose
Urva urva
Stripe-necked Mongoose
Urva vitticollis
Kalko's Yellow-eared Bat
Vampyressa elisabethae
Melissa's Yellow-eared Bat
Vampyressa melissa
Southern Little Yellow-eared Bat
Vampyressa pusilla
Northern Little Yellow-eared Bat
Vampyressa thyone
Villa's Little Yellow-eared Bat
Vampyressa villai
Voragine's Yellow-eared Bat
Vampyressa voragine
Bidentate Yellow-eared Bat
Vampyriscus bidens
Brock's Yellow-eared Bat
Vampyriscus brocki
Striped Yellow-eared Bat
Vampyriscus nymphaeus
Caracciolo's Stripe-faced Bat
Vampyrodes caraccioli
Great Stripe-faced Bat
Vampyrodes major