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.
Luzon Short-nosed Rat
Tryphomys adustus
Tsinling Rat-like Hamster
Tscherskia collina
Common Rat-like Hamster
Tscherskia triton
Northern Treeshrew
Tupaia belangeri
Golden-bellied Treeshrew
Tupaia chrysogaster
Banka Island Treeshrew
Tupaia discolor
Striped Treeshrew
Tupaia dorsalis
Mindanao Treeshrew
Tupaia everetti
Sumatran Treeshrew
Tupaia ferruginea
Common Treeshrew
Tupaia glis
Slender Treeshrew
Tupaia gracilis
Javan Treeshrew
Tupaia hypochrysa
Horsfield's Treeshrew
Tupaia javanica
Long-footed Treeshrew
Tupaia longipes
Lesser Treeshrew
Tupaia minor
Mountain Treeshrew
Tupaia montana
Nicobar Treeshrew
Tupaia nicobarica
Palawan Treeshrew
Tupaia palawanensis
Painted Treeshrew
Tupaia picta
Kalimantan Treeshrew
Tupaia salatana
Splendid Treeshrew
Tupaia splendidula
Large Treeshrew
Tupaia tana
Indo-Pacific Bottlenose Dolphin
Tursiops aduncus
Tamanend's Bottlenose Dolphin
Tursiops erebennus
Common Bottlenose Dolphin
Tursiops truncatus
Chiapan Climbing Rat
Tylomys bullaris
Fulvous-bellied Climbing Rat
Tylomys fulviventer
Mira Climbing Rat
Tylomys mirae
Peters's Climbing Rat
Tylomys nudicaudus
Panama Climbing Rat
Tylomys panamensis
Tumbala Climbing Rat
Tylomys tumbalensis
Watson's Climbing Rat
Tylomys watsoni
Indomalayan Lesser Bamboo Bat
Tylonycteris fulvida
Malayan Greater Bamboo Bat
Tylonycteris malayana
Sunda Lesser Bamboo Bat
Tylonycteris pachypus
Pygmy Bamboo Bat
Tylonycteris pygmaea
Sumatran Greater Bamboo Bat
Tylonycteris robustula
Tonkin Greater Bamboo Bat
Tylonycteris tonkinensis
Red Viscacha Rat
Tympanoctomys barrerae
Kirchners' Viscacha Rat
Tympanoctomys kirchnerorum
Chalchalero Viscacha Rat
Tympanoctomys loschalchalerosorum
Chapa Tree Mouse
Typhlomys chapensis
Soft-furred Tree Mouse
Typhlomys cinereus
Dalou Mountains Tree Mouse
Typhlomys daloushanensis
Fengjie Tree Mouse
Typhlomys fengjiensis
Huangshan Tree Mouse
Typhlomys huangshanensis
Dwarf Tree Mouse
Typhlomys nanus
Southern Tree Mouse
Typhlomys taxuansis
Liberian Forest Striped Mouse
Typomys planifrons
West African Striped Mouse
Typomys trivirgatus
Rudd's Bristle-furred Rat
Uranomys ruddi
Uinta Ground Squirrel
Urocitellus armatus
Belding's Ground Squirrel
Urocitellus beldingi
Idaho Ground Squirrel
Urocitellus brunneus
Merriam's Ground Squirrel
Urocitellus canus
Columbian Ground Squirrel
Urocitellus columbianus
Wyoming Ground Squirrel
Urocitellus elegans
Snake River Plains Ground Squirrel
Urocitellus idahoensis
Piute Ground Squirrel
Urocitellus mollis
Arctic Ground Squirrel
Urocitellus parryii