It lives in all types of habitats except water bodies without any vegetation or floating material. It is at home in the cities as well as in the villages or the crop fields.The Brown Rat, also called Tree Rat is the most arboreal among the rats found in the countryside and forests. It usually lives in pairs or in a family group in a burrow or tree-nest and group being dominated a male that often defends its virtually borderless territory against an intruding male. It is a true omnivore (Sarker et al. 2013). This species has an acute sense of hearing and sensitive to ultrasound. It is a good swimmer, both on the surface and underwater. During excessive flood it climbs to trees and leads its normal life there up to the time the water recedes (Khan 1985, 1987, Nowak and Paradiso 1983, Parker 1990). This spcies also produces communicative noises audidle to humans.

The species has been found at community households and bamboo forests.

It occurs in moist evergreen broadleaf forests, temperate forests, coniferous forests, scrub forests, rocky areas and mountain peaks.This species is solitary, arboreal, active and vocal animal. Capable of gliding a long distance between the trees. At rest it folds the flying membrane close to the body. Feeds on tree buds, leaves, bark saps, young branches and various fruits and nuts. Mating is believed to occur twice a year and the young are generally born during March-August. Usually 2-3 young are born per litter.

This species occurs in denuded mixed evergreen tropical and subtropical and broad-leafed forests. It is active at night and sleeps in tree-holes or a shady place of a tree during daytime. It glides from tree to tree in search of food. Feeds on fruits, seeds, barks, sap and resin, and tender leaves and shoots. When asleep it puts its head under the body just like Bengal Slow Loris. It breeds during the rainy season and lays one young in a tree-hollow.

It is known to prefer sugarcane and soyabean fields in the northwestern parts of the country. It is nocturnal and fossorial.

It is partial to human habitations and crop fields nearby. House Mouse lives in and around human habitations, grain stores, market places, commercial centres, office complexes, old motor launch, passenger steamers as well as crop fields and stored grain house. It is apt in running, climbing trees, swimming and walking. It can live anywhere inside a house which is sparingly used. It is a prolific breeder and the babies mature in just one month. It is an omnivore and breeds all year round (Khan 1987).

The species has been found at community households and upland crop fields. The species is also found at bamboo and mixed forests.

It is found commonly in the embankments or the plot dividing land boundaries along irrigated fields or patches of thorn scrub on the edges of cultivation lands. It Iives in small burrows, under roots or stones, dug by itself. It is nocturnal and fossorial. Feeds on vegetables, seeds and also on insects (Aplin et al. 2008).

It is found in tropical and subtropical dry deciduous forests, tropical grasslands, irrigated croplands and grasslands with gravel, agricultural lands, water courses, embankments, dry rocky hills (Molur et al. 2005). It lives in pairs or small colonies in self-dug out burrows. It can reproduce throughout the year (Kamruzzaman 2009).

The species has been found at community households and bamboo forests.