Meet the world’s animals.

Photos: 12,584 · Stories: 19,526

• Red-tailed Chipmunk Tamias (Neotamias) ruficaudus

  

  Its striped back and face contrast with rufous shoulders and sides and an orange-red underside to the tail. It inhabits dense conifer forest, especially shrub-rich openings and edges.

• Labrador Collared Lemming Dicrostonyx hudsonius

  

  This lemming changes coat color with the seasons: white in winter and gray to brown in warmer seasons. It burrows in the tundra of northeastern Canada and eats grasses and shrub buds.

• Least Pygmy Squirrel Exilisciurus exilis

  

  The least pygmy squirrel is a very small squirrel endemic to Borneo. It moves along tree trunks and lianas and feeds mainly on bark.

• Gray Dwarf Hamster Cricetulus migratorius

  

  The HMW account under Cricetulus migratorius describes a dark gray-brown to sandy-gray back, white to grayish-white underside, and short whitish tail. The Mongolia account records it in dry hills and mountains, oases and valleys with shrubs and herbs; it gathers plant material and stores food near its burrow.

• Perny's Long-nosed Squirrel Dremomys pernyi

  

  The Taiwan subspecies, Dremomys pernyi owstoni, has a yellow belly and long snout. It searches the ground by day for fallen fruit and seeds.

• Caatinga Laucha Calomys expulsus

  

  The Caatinga Laucha is a vesper mouse from central and northeastern Brazil. It occurs in open grasslands and forest edges in the Cerrado and Caatinga, as well as cultivated fields, and lives on the ground and eats seeds.

• Bobak Marmot Marmota (Marmota) bobak

  The Bobak marmot inhabits steppes from central Europe to central Asia and spends winter in underground burrows. Its coat changes with the seasons.

• Magdalena Rat Xenomys nelsoni

  The Magdalena rat lives in dry forests on Mexico's Pacific coast. It is arboreal and nocturnal, usually solitary, and feeds on leaves, buds, and fruit.

• Central American Dwarf Squirrel Microsciurus alfari

  Alfaro's pygmy squirrel ranges from Central America into Colombia. It lives hidden in forest undergrowth, and little direct information is available about its diet.

• Meadow Vole Microtus (Mynomes) pennsylvanicus

  The meadow vole occurs widely in North American grasslands and wetlands and favors places where grass remains.

• African Palm Squirrel Epixerus ebii

  The African palm squirrel is a forest squirrel with a patchy range in West and Central Africa. It is recognizable by its gray back, orange to red underside, and patterned tail.

• Collared Lemming Dicrostonyx groenlandicus

  This stocky Arctic lemming has a thick coat that changes with the seasons, becoming white in winter.

• Bornean Mountain Ground Squirrel Dremomys everetti

  This squirrel occurs in the mountains of Borneo. Stomach contents from 26 Mount Trus specimens were mostly insects, with fruit, nuts, leaves, and shoots also recorded. The current Mammal Diversity Database uses Sundasciurus everetti, while ADW retains the older genus.

• Savi's Pine Vole Microtus (Terricola) savii

  This vole has reddish-brown fur and a short tail. It makes underground galleries and lives in colonies in grassland and around fields.

• Siberian chipmunk Tamias (Eutamias) sibiricus

  A chipmunk of northern Asian forests that uses both the ground and trees.

• Rock Mouse Peromyscus difficilis

  The Rock Mouse is listed from Mexico in the current mammal database. A 2010 species account describes large ears and a bicolored tail slightly longer than the head and body.

• Ear-spot Squirrel Callosciurus adamsi

  The ear-spot squirrel lives on Borneo. A pale patch behind each ear is a useful identifying feature.

• Zacatecan Harvest Mouse Reithrodontomys (Reithrodontomys) zacatecae

  The Zacatecan harvest mouse has a reddish-brown back and a relatively long tail. In Jalisco, it is recorded in high temperate areas.

• Asian Red-cheeked Squirrel Dremomys rufigenis

  The Asian red-cheeked squirrel ranges from southern China across parts of northern South and Southeast Asia. It forages both on the ground and in trees.

• Orizaba Deermouse Peromyscus beatae

  The Orizaba Deermouse ranges from southeastern Mexico into Central America. It has been recorded in humid mountain forests.

• Indochinese Ground Squirrel Menetes berdmorei

  This diurnal squirrel spends most of its time on the ground. It has a gray-brown back, a pale underside, and flank stripes that vary among subspecies.

• Golden Mouse Ochrotomys nuttalli

  This small mouse has golden upper fur, a white underside and feet, and a tail it can use while climbing.

• Olympic Marmot Marmota (Petromarmota) olympus

  The Olympic marmot lives only in Olympic Mountain meadows. It eats flowering plants, stores fat and hibernates for a long period.

• Mexican Woodrat Neotoma (Neotoma) mexicana

  The Mexican woodrat has a gray-brown back, a pale underside, and a two-tone tail. It nests in rocky crevices and is solitary and mostly active at night.