Meet the world’s animals.

Photos: 12,636 · Stories: 19,540

• Cleft-headed Juliomys Juliomys rimofrons

  

  This small rodent is known from southeastern Brazil. It has long ochre-brown fur and an orange rump; known specimens came from ground-level traplines.

• Svynnerton's Bush Squirrel Paraxerus vexillarius

  

  Swynnerton's bush squirrel is recorded from mountains in Tanzania. Specimens from the West Usambara Mountains are noted for orange feet and a tail tip.

• Coues' Oryzomys Oryzomys couesi

  

  Coues' oryzomys uses wetland habitat. At the southern tip of Texas, it is recorded among cattails and aquatic grasses.

• Perote Ground Squirrel Xerospermophilus perotensis

  

  This ground squirrel lives in the highlands of eastern Mexico. It is active by day and retreats to underground burrows at night.

• Gray Red-backed Vole Myodes rufocanus

  

  This vole occurs across northern Eurasia. It has a reddish-brown back and gray sides; in northern Europe it is common in conifer forest and also lives in scrub and meadows.

• California Chipmunk Tamias (Neotamias) obscurus

  

  In summer, its head is pale gray with cinnamon tones, and russet and pale-gray stripes mark its back. In southern California it is recorded in pinyon-juniper and pine-oak forests, often near shrubs and rocky outcrops.

• Common Pericote Graomys griseoflavus

  The common pericote is a mouse broadly distributed in dry parts of Argentina. It has a gray-yellow back, pale underside, and a long tail ending in a brush-like tuft.

• Spotted Ground Squirrel Xerospermophilus spilosoma

  The spotted ground squirrel is a ground-dwelling squirrel of dry and open habitats in Texas. It stays near its burrow and is active in early morning and late afternoon.

• Ash-colored Oldfield Mouse Thomasomys cinereus

  This mouse has soft, dense gray fur and is active on the ground at night. The account notes that the name may cover a species complex.

• Red Giant Flying Squirrel Petaurista petaurista

  The red giant flying squirrel spreads a membrane between its limbs to glide from tree to tree. It is nocturnal and lives among forest trees.

• Peter's Climbing Rat Tylomys nudicaudus

  Peter's Climbing Rat is a large rodent with a long, naked tail and reddish-brown back. It is active at night and around dawn in forests.

• Bolivian Squirrel Sciurus (Guerlinguetus) ignitus

  The Bolivian squirrel lives in trees in South American mountain forests. It has an ocher or brown back, orange lower face and belly, and a rusty-red tail.

• Nimble-footed Deermouse Peromyscus levipes

  The nimble-footed deermouse is a member of the deer-mouse group found in the mountains of eastern Mexico.

• Round-tailed Ground Squirrel Xerospermophilus tereticaudus

  The round-tailed ground squirrel lives on sandy desert flats, dunes, and wash edges. It mainly eats green vegetation, with seeds and insects added seasonally.

• Brush Deermouse Peromyscus boylii

  The brush deermouse has a brown back, a pale underside, and a long tail with a tufted tip. It is active at night and uses trees and rock crevices.

• Japanese flying squirrel Pteromys momonga

  A Japanese forest squirrel that glides between trees. It is mainly active in the treetops at night.

• Golden Oldfield Mouse Thomasomys aureus

  This rodent is recorded in the mountains of eastern Ecuador. It has long fur, a grizzled yellow-brown back, and a paler underside.

• Red-tailed Squirrel Sciurus (Guerlinguetus) granatensis

  The red-tailed squirrel is an arboreal squirrel with variable coat and tail colors; fruits, nuts and seeds make up much of its diet.

• Oaxaca giant deer mouse Megadontomys cryophilus

  This large deer mouse lives in the highland forests of Oaxaca, with a dark back, ocher sides, and a slate-gray belly. It uses the dense understory of high-elevation forest.

• Shrew-faced Squirrel Rhinosciurus laticaudatus

  This squirrel is recognized by its long snout and pale sides. It searches the forest floor for insects and earthworms.

• Reed Vole Microtus (Alexandromys) fortis

  A large vole associated with wet grasslands. Seasonal movements in the Dongting Lake area have been studied in relation to changing lake levels.

• Northern Amazon Red Squirrel Sciurus (Urosciurus) igniventris

  The northern Amazon red squirrel is a large tree squirrel of northwestern Amazonia. It can be difficult to distinguish from the southern Amazon red squirrel in the field, and one feeding study analyzed the two together.

• Arizona Cotton Rat Sigmodon (Sigmodon) arizonae

  The Arizona cotton rat is a large rodent of the southwestern United States and northwestern Mexico. It has dark brown-black fur above and silver or white fur below.

• Small Sun Squirrel Heliosciurus punctatus

  This squirrel has dark, soft fur and a long ringed tail. In West Africa, it is recorded in rainforest and forests within forest–savanna mosaics.