Mammals 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.

Spectral Bat
Vampyrum spectrum

Nilgiri Long-tailed Climbing Mouse
Vandeleuria nilagiricus
Sri Lankan Long-tailed Climbing Mouse
Vandeleuria nolthenii

Indomalayan Long-tailed Climbing Mouse
Vandeleuria oleraceus
Rüppell's Bat
Vansonia rueppellii

Red Ruffed Lemur
Varecia rubra

Black-and-white Ruffed Lemur
Varecia variegata
Apparent Climbing Mouse
Vernaya foramena
Vernay's Climbing Mouse
Vernaya fulva
Meigu Climbing Mouse
Vernaya meiguites
Nushan Climbing Mouse
Vernaya nushanensis
Inland Forest Bat
Vespadelus baverstocki
Northern Cave Bat
Vespadelus caurinus
Large Forest Bat
Vespadelus darlingtoni
Yellow-lipped Cave Bat
Vespadelus douglasorum

Finlayson's Cave Bat
Vespadelus finlaysoni
Eastern Forest Bat
Vespadelus pumilus
Southern Forest Bat
Vespadelus regulus
Eastern Cave Bat
Vespadelus troughtoni

Little Forest Bat
Vespadelus vulturnus

Eurasian Particolored Bat
Vespertilio murinus

Asian Particolored Bat
Vespertilio sinensis

Malabar Civet
Viverra civettina

Large-spotted Civet
Viverra megaspila

Malay Civet
Viverra tangalunga

Large Indian Civet
Viverra zibetha

Small Indian Civet
Viverricula indica
Anjozorobe Naked-tail Forest Mouse
Voalavo antsahabensis
Northern Naked-tail Forest Mouse
Voalavo gymnocaudus
Sichuan Vole
Volemys millicens
Marie's Vole
Volemys musseri

Common Wombat
Vombatus ursinus

Marbled Polecat
Vormela peregusna

Indian Fox
Vulpes bengalensis

Blanford's Fox
Vulpes cana

Cape Fox
Vulpes chama

Corsac Fox
Vulpes corsac

Tibetan Fox
Vulpes ferrilata

Arctic Fox
Vulpes lagopus

Kit Fox
Vulpes macrotis
Pale Fox
Vulpes pallida

Rüppell's Fox
Vulpes rueppellii

Swift Fox
Vulpes velox

Red Fox
Vulpes vulpes

Fennec Fox
Vulpes zerda
Mamasa Water Rat
Waiomys mamasae

Swamp Wallaby
Wallabia bicolor

Cerrado Red-nosed Mouse
Wiedomys cerradensis
Common Red-nosed Mouse
Wiedomys pyrrhorinos

Red-nosed Tree Mouse
Wilfredomys oenax
Scaly-tailed Possum
Wyulda squamicaudata

Northern Pygmy Slow Loris
Xanthonycticebus intermedius

Southern Pygmy Slow Loris
Xanthonycticebus pygmaeus

Long-nosed Mongoose
Xenogale naso

Magdalena Woodrat
Xenomys nelsoni
Jamaican Monkey
Xenothrix mcgregori
Rock-dwelling Giant Rat
Xenuromys barbatus
False Water Rat
Xeromys myoides

Vieira's Long-tongued Bat
Xeronycteris vieirai

Mohave Ground Squirrel
Xerospermophilus mohavensis