It inhabits dry deciduous forests, scrub forests, grasslands, uncultivated areas, undisturbed barren open areas. In Turkey, it appears to prefer uncultivated arid and semi-arid habitats with soft soil and dry river slopes (Yi?it et al. 2001). Terrestrial and fossorial; makes extensive burrows, depending on surrounding soils, with chambers for resting, food storage, and sleeping. Territorial, individuals live in separate burrows and canabalistic mainly on juveniles (Menon 2003). Omnivorous. Diets include grains, seeds, plants, roots, insects, reptiles and even small birds and mammals it can catch up (Yapa and Ratnavira 2013).

This species is found in a very wide variety of habitats, including forested areas, grasslands, agricultural lands, and in areas associated with human settlements. It is highly adaptable and can colonize at high densities. Typically terrestrial, active during the night, spending the day in a burrow or any hiding places. It is a good swimmer and climber, comes out of its hiding places at dusk with species-specific shrill or squeaky call notes like chik-chikchik from which the common Bengali name Chika has been derived. In addition to natural food it would readily consume food left over in the kitchen or offals dumped at the backyard. It produces an obnoxious smell that nobody likes (Khan 1985, 1987, 2015). It is a voracious insectivore and also opportunistic feeder. It breeds throughout the year, usually producing two litters per year. The gestation period is one month.

This species is very secretive, nocturnal and fossorial. No information is available on its diet but usually it comprises of insects and their larvae, earthworm and other invertebrates (Kamruzzaman 2009, Khan 1982, 1985, 1987, 2015). It is purely a forest floor dwelling mammal.

It inhabits primary and mature secondary mixed evergreen and deciduous Sal forests. It is tolerant to some degree of habitat modifications (Kamruzzaman 2009, Han 2008). It spends time both in trees and on the ground, moves very fast and feeds on arthropods, fruits and leaves.

The species is found at community households and crop fields.

Typical habitats are forest and forest edges, densely vegetated bamboo bushes, and sun-grass fields and found even with the harvested remains in agricultural fields (Molur et al. 2005). They are mostly arboreal and usually inhabits forest and forest edge.

It occurs in a wide variety of habitats with sufficient trees such as primary and secondary forests, scrub forests, and gardens, including the degraded areas and areas around human habitation (Smith and Xie 2008). It is diurnal and arboreal. This squirrel feeds on fruits, vegetables and some insects. It takes shelter in tree holes. No information is available on its breeding (Francis 2008).

It inhabits only the mixed evergreen forested areas. It is diurnal and arboreal.

House Rats adapt to a wide range of habitats. In urban areas they are found around storehouses, residential buildings, and other human settlements. They are also found in agricultural areas, such as in crop fields. In urban areas, they are commonly found in wall cavities and false ceilings as well as they prefer to live in dry upper levels of buildings or roofs. In the wild, they live in cliffs, rocks, the ground, and trees. This species is primarily commensal with the human beings but also found in a diverse natural and semi-natural habitat. It is a serious pest to the crops of all kinds, stored grains, food items and responsible for carrying and spreading diseases like the plague. It walks, runs, swims and climbs trees at ease. It builds a nest of dry materials that could be parts of linen, books and other household materials in a disused corner of a house, store house and in burrows. It is a prolific breeder.