Meet the world’s animals.

Photos: 12,636 · Stories: 19,540

• Hairy-eared Akodont Thalpomys lasiotis

  

  This small rodent occurs in the Cerrado of central Brazil. Most capture records are from open grassland, including sites with scattered low shrubs.

• Amazon Dwarf Squirrel Microsciurus flaviventer

  

  The Amazon dwarf squirrel has a brownish back, orange chest, and pale-tipped tail shorter than its body. By day it moves along forest trunks and vines while searching for insects and palm fruits.

• Little Laucha Calomys laucha

  

  The Little Laucha is a small South American rodent weighing under 20 g. A study in central Argentine farmland reported a diet mainly of green plant material and seeds.

• Uinta Chipmunk Tamias (Neotamias) umbrinus

  

  This chipmunk occurs in mountains of the western United States. It has long, pointed ears and prefers montane coniferous forest.

• Medium-tailed Rice Rat Eremoryzomys mesocaudis

  

  This rodent was described from the Marañón River region of northern Peru. A black line at the center of the nose tip is one of its diagnostic features.

• Western Dwarf Squirrel Microsciurus mimulus

  

  This small squirrel has reddish or olive tones mixed into its dark back. It is active by day, uses trees and the ground, and feeds on tree sap and insects.

• Arctic Lemming Dicrostonyx torquatus

  The Arctic lemming is a small rodent of the Eurasian tundra. Its coat is grayish in summer and white in winter, and it may store foods such as willows.

• Long-tailed Ground Squirrel Urocitellus undulatus

  The long-tailed ground squirrel is a medium-sized, ground-dwelling squirrel of Central Asia. A Mongolian study found several genetically distinct regional groups.

• Cerrado Akodont Thalpomys cerradensis

  This small rodent lives in Brazil’s Cerrado. It is terrestrial and most active after sunset and in the hours before sunrise.

• Ring-tailed Ground Squirrel Notocitellus annulatus

  This ground squirrel lives in forests along Mexico’s Pacific coast. It is active in the morning and climbs shrubs and trees as well as using the ground.

• Crested Rat Lophiomys imhausi

  This East African rodent has fur with white stripes or spots. It is active at night and feeds on fruits and roots.

• Mount Topapu Squirrel Prosciurillus topapuensis

  This squirrel occurs in central Sulawesi, Indonesia. Records span tropical lowland evergreen to upper montane forest at 350–2,800 m. It is often found high in primary-forest crowns or woody vines, but has also been observed on the ground where the canopy is broken.

• Tatra Pine Vole Microtus (Microtus) tatricus

  The Tatra pine vole is recorded in upper montane forest and alpine meadow in the Tatra Mountains. Its back is light reddish brown, and records include rocky debris near streams.

• Min Mountain Striped Squirrel Tamiops minshanica

  This striped squirrel was described from the Minshan Mountains of Sichuan, China. A 2026 multilocus study also recognizes it among the valid species of Tamiops.

• White-throated Montane Forest Rat Drymoreomys albimaculatus

  This rodent occurs in the Serra do Mar of southeastern Brazil. Its back is orange-toned, with white areas on the throat and chest. It is recorded in humid montane Atlantic Forest; the account describes it as nocturnal, with most study captures on the ground.

• Mexican Prairie Dog Cynomys (Cynomys) mexicanus

  The Mexican prairie dog is a squirrel relative that burrows in dry grasslands of northern Mexico. It comes above ground by day and lives in social groups.

• North American Water Vole Microtus richardsoni

  A vole that lives near water in western North American mountains. It burrows by water and is mostly active at night, though daytime activity has also been recorded.

• Arrow Flying Squirrel Hylopetes sagitta

  This flying squirrel is reported from Java and Bangka. At Mount Ungaran in Central Java, a paper documented nighttime activity in October 2024; the three animals observed were mainly in trees.

• Fulvous Harvest Mouse Reithrodontomys (Reithrodontomys) fulvescens

  This small mouse lives in grassland and riparian habitats and is active at night. Its tail is differently coloured above and below, while its coat and diet vary by place and season.

• Red-cheeked Ground Squirrel Spermophilus erythrogenys

  The red-cheeked ground squirrel is a ground-dwelling squirrel marked by reddish cheeks. Regional records describe it as active by day, using burrows and feeding on grasses and other foods.

• Nayarit mouse Peromyscus simulus

  The Nayarit mouse is recorded on the coastal lowlands of Nayarit in western Mexico. Specimens come from tropical forest and moist riverine settings.

• Kintampo Rope Squirrel Funisciurus substriatus

  This squirrel lives in West African savannas and riverside woods. Its back ranges from greenish yellow to ochre, with white side stripes and a ringed tail.

• Russet Oryzomys Euryoryzomys russatus

  This rice rat lives in forests of eastern South America. It builds an egg-shaped nest from leaves and grass under or inside fallen logs and among palm roots.

• Utiariti Colilargo Oligoryzomys utiaritensis

  This small rodent is recorded from Brazil’s Cerrado–Amazon transition. It has also been captured in secondary forest and plantations near farmland.