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.

This dolphin inhabits coastal, pelagic and marine waters of the Bay of Bengal. Very social and occurred up to 200 animals in one group. Forage over reefs or soft bottom substrata and near the shore. It moves from coastal water to the deep marine water and vice versa. Mostly breeds during December to March.

It generally occurrs in small group of 1-6 animals in the Sundarbans and 1-10 animals in the coastal water, and they are very social. Inconspicuous surfacing, only show part of the back. Leaps are infrequent. Average dive duration is 115.3 second. Turbid fresh and brackish waters in the waterways of the Sundarbans and freshwater affected coastal waters in the Bay of Bengal. They prefer water depth from 2.7-16.0 meter and salinity from 7.0-34.0 ppt (Smith et al. 2008).

It is found as single, pairs or groups of up to 7 animals (Smith et al. 2008). They prefer habitat with sandy and soft bottom, and feed on small fishes, cephalopods, and crustaceans (mainly demersal species) (Jefferson and Hung 2004). They prefer mangrove swamps, estuarine brackish, coastal and marine water in the Bay of Bengal. They prefer water depth from 5.9-16.0 meter and salinity from 15.0-32.0 ppt.

It is found in all forests in the country as well as homestead vegetations, bamboo thickets and old graveyard. Also found in sub-urban areas. This species is primarily nocturnal and terrestrial but sometimes active during day. It usually spends daytime in burrows, tree holes and thickets. Also it likes to hide in disused buildings and ruins. This civet is omnivorous; feeds on small mammals, birds, reptiles, frogs, insects, fruits and some vegetable matter (Khan 1985, 1987, 2009). Small Indian Civet marks its territory with the characteristic scent secreted from the civet gland. No marked breeding season; young seen throughout the year. Litter size varies from 2 to 5 babies (Francis 2008).

This cat occurs in a broad spectrum of habitats that include moist deciduous Sal forest, wet coastal mangrove forest and semi evergreen forest, as well as shrubs and grasslands (Khan 2005, 2008, Asmat 2009). Leopard Cat is mainly nocturnal, crepuscular and semi arboreal. Like most felids, it is opportunistic and prey on small rodents, reptiles, amphibians, birds, fish, crabs, insects, deer fawn and feeds on carrion (Khan 2004, 2008, Asmat 2009).

It inhabits mixed evergreen forest, near water and paddy field, forest undercover and the areas bordering forests. It is diurnal, shy and carnivorous; feeding on frogs, lizards, small birds and bird eggs and small rodents.

In Bangladesh, the Jungle Cat inhabits variety of habitats namely bushes, forests, swamps, cultivation and near human settlements (Khan 2008). The Jungle Cat is mainly nocturnal, crepuscular and solitary. It commonly consumes rodents, lizards, snakes, frogs, fish, insects, livestock and even fruits. Breeds during December-March (Sunquist and Sunquist 2002, Khan 1987, 2008, Ahmed et al. 2009).