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.
Linnaeus's Mouse Opossum
Marmosa murina
Nicaraguan Woolly Mouse Opossum
Marmosa nicaraguae
Southeastern Woolly Mouse Opossum
Marmosa paraguayana
Peruvian Woolly Mouse Opossum
Marmosa parda
Anthony's Woolly Mouse Opossum
Marmosa perplexa
Little Woolly Mouse Opossum
Marmosa phaea
Bolivian Woolly Mouse Opossum
Marmosa rapposa
Robinson's Mouse Opossum
Marmosa robinsoni
Red Mouse Opossum
Marmosa rubra
Bare-tailed Woolly Mouse Opossum
Marmosa rutteri
Simons's Mouse Opossum
Marmosa simonsi
Tyleria Mouse Opossum
Marmosa tyleriana
Waterhouse's Mouse Opossum
Marmosa waterhousei
Dryland Mouse Opossum
Marmosa xerophila
Zeledon's Mouse Opossum
Marmosa zeledoni
Bishop's Slender Opossum
Marmosops bishopi
Carr's Slender Opossum
Marmosops carri
Tschudi's Slender Opossum
Marmosops caucae
Cordillera Slender Opossum
Marmosops chucha
Creighton's Slender Opossum
Marmosops creightoni
Dusky Slender Opossum
Marmosops fuscatus
Handley's Slender Opossum
Marmosops handleyi
Gray Slender Opossum
Marmosops incanus
Panama Slender Opossum
Marmosops invictus
Junin Slender Opossum
Marmosops juninensis
Río Magdalena Slender Opossum
Marmosops magdalenae
Silva's Slender Opossum
Marmosops marina
White-bellied Slender Opossum
Marmosops noctivagus
Spectacled Slender Opossum
Marmosops ocellatus
Ojasti's Slender Opossum
Marmosops ojastii
Pantepui Slender Opossum
Marmosops pakaraimae
Delicate Slender Opossum
Marmosops parvidens
Brazilian Slender Opossum
Marmosops paulensis
Pinheiro's Slender Opossum
Marmosops pinheiroi
Soini's Slender Opossum
Marmosops soinii
Woodall's Slender Opossum
Marmosops woodalli
Gray Marmot
Marmota baibacina
Bobak Marmot
Marmota bobak
Alaska Marmot
Marmota broweri
Hoary Marmot
Marmota caligata
Black-capped Marmot
Marmota camtschatica
Long-tailed Marmot
Marmota caudata
Yellow-bellied Marmot
Marmota flaviventris
Himalayan Marmot
Marmota himalayana
Forest Steppe Marmot
Marmota kastschenkoi
Alpine Marmot
Marmota marmota
Menzbier's Marmot
Marmota menzbieri
Woodchuck
Marmota monax
Olympic Marmot
Marmota olympus
Tarbagan Marmot
Marmota sibirica
Vancouver Island Marmot
Marmota vancouverensis
American Marten
Martes americana
Pacific Marten
Martes caurina
Yellow-throated Marten
Martes flavigula
Stone Marten
Martes foina
Nilgiri Marten
Martes gwatkinsii
European Pine Marten
Martes martes
Japanese Marten
Martes melampus
Sable
Martes zibellina
Mzab Gundi
Massoutiera mzabi