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.
Allen's Big-eared Bat
Idionycteris phyllotis
Long-eared Pygmy Anomalure
Idiurus macrotis
Zenker's Pygmy Anomalure
Idiurus zenkeri
Incan Water Rat
Incanomys mayopuma
Longman's Beaked Whale
Indopacetus pacificus
Indri
Indri indri
Araguaian River Dolphin
Inia araguaiaensis
Bolivian River Dolphin
Inia boliviensis
Amazon River Dolphin
Inia geoffrensis
Orinoco River Dolphin
Inia humboldtiana
Javanese Flying Squirrel
Iomys horsfieldii
Mentawai Flying Squirrel
Iomys sipora
Chilean Climbing Mouse
Irenomys tarsalis
Montane Hutia
Isolobodon montanus
Puerto Rican Hutia
Isolobodon portoricensis
Golden Bandicoot
Isoodon auratus
Western Brown Bandicoot
Isoodon fusciventer
Northern Brown Bandicoot
Isoodon macrourus
Southern Brown Bandicoot
Isoodon obesulus
Cape York Brown Bandicoot
Isoodon peninsulae
Barbara Brown's Brush-tailed Rat
Isothrix barbarabrownae
Yellow-crowned Brush-tailed Rat
Isothrix bistriata
Rio Negro Brush-tailed Rat
Isothrix negrensis
Orinoco Brush-tailed Rat
Isothrix orinoci
Plain Brush-tailed Rat
Isothrix pagurus
Sinnamary Brush-tailed Rat
Isothrix sinnamariensis
Yellow Deermouse
Isthmomys flavidus
Mount Pirre Deermouse
Isthmomys pirrensis
Blanford's Jerboa
Jaculus blanfordi
African Hammada Jerboa
Jaculus hirtipes
Lesser Egyptian Jerboa
Jaculus jaculus
Arabian Jerboa
Jaculus loftusi
Greater Egyptian Jerboa
Jaculus orientalis
Delicate Red-nosed Tree Mouse
Juliomys ossitenuis
Small Red-nosed Tree Mouse
Juliomys pictipes
Montane Red-rumped Tree Mouse
Juliomys rimofrons
Araucaria Forest Tree Mouse
Juliomys ximenezi
Candango Burrowing Mouse
Juscelinomys candango
Huanchaca Burrowing Mouse
Juscelinomys huanchacae
Javan Bamboo Rat
Kadarsanomys sodyi
Atlantic Bamboo Rat
Kannabateomys amblyonyx
Tanzanian Woolly Bat
Kerivoula africana
Saint Aignan's Woolly Bat
Kerivoula agnella
Damara Woolly Bat
Kerivoula argentata
Cryptic Woolly Bat
Kerivoula crypta
Coppery Woolly Bat
Kerivoula cuprosa
Flat-skulled Woolly Bat
Kerivoula depressa
Indochinese Woolly Bat
Kerivoula dongduongana
Ethiopian Woolly Bat
Kerivoula eriophora
Flores Woolly Bat
Kerivoula flora
Dark Woolly Bat
Kerivoula furva
Hardwicke's Woolly Bat
Kerivoula hardwickii
Small Woolly Bat
Kerivoula intermedia
Kachin Woolly Bat
Kerivoula kachinensis
Krau Woolly Bat
Kerivoula krauensis
Lesser Woolly Bat
Kerivoula lanosa
Lenis Woolly Bat
Kerivoula lenis
Sri Lankan Woolly Bat
Kerivoula malpasi
Least Woolly Bat
Kerivoula minuta
Fly River Woolly Bat
Kerivoula muscina