Animal Life of Bangladesh :

With the exception of the Chittagong Hill Tracts District, portions of the Madhupur Tract, and the Sundarbans (a great tidal mangrove swamp in the southwestern corner of the country), few extensive forests remain in Bangladesh, the forested and wooded area amounting to about one-eighth of the total area. Broadleaf evergreen species characterize the hilly regions, and deciduous trees, such as acacia and banyan, are common in the drier plains areas. Commercially valuable trees in Bangladesh include sundari (hence the name Sundarbans), gewa, sal (mainly growing in the Madhupur Tract), and garyan (in the Chittagong Hill Tracts District). Village groves abound in fruit trees (mango and jackfruit, for instance) and date and areca (betel) palms. The country also has many varieties of bamboo.

Bangladesh is rich in fauna, including 109 indigenous species of mammals, 684 types of birds, 119 kinds of reptiles, 19 different amphibians, and 200 varieties of marine and freshwater fish. The rhesus monkey is common, and gibbons and lemurs are also found. The Sundarbans area is one of the principal remaining domains of the Bengal tiger, and herds of elephants and many leopards inhabit the Chittagong Hill Tracts District. Other animals living in Bangladesh include mongoose, jackal, Bengal fox, wild boar, parakeet, kingfisher, vulture, and swamp crocodile.

The Royal Bengal Tiger:

The majestic Royal Bengal Tiger is the national animal Bangladesh. Highly endangered, the Royal Bengal can now be mostly be found in the Sundarbans.
One of the largest of the 'big cats', it has extremely bold and striking colour pattern - making it perhaps the most magnificent and sought-after fiery beast of the world! The vivid pattern of stripes on the glossy skin serves as a very effective camouflage in the grasses and foliage almost in all the seasons. The male averages 3 metres in length including 1 meter of tail and wiighs about 180 kg., though much larger speciemens have been lnown. The giant one is the Siberian tiger, almost 4 metres long and weighing about 300 kg.

Deers

The Sambar Deer is the most widely spread deer species in the world, covering many countries in the Asian continent. It is also one of the larger members of the deer family. Some males are known to weigh up to 300 kgs and can grow to a height ranging from 135 - 150 cms at the shoulders.

These animals have a life expectancy ranging between 16 - 20 years. They are the favourite prey species of the tiger. A large sambar can feed a feed tiger for up to 4 days. Unlike the Spotted deer, which shouts an alarm and darts away at the sight of a predator, the sambar tends to alertly watch and keep giving alarm calls until the danger has passed. A reason due to which many of them fall prey for predators. The Sambar can be found in the wooded hills of the north-east and east.
The Chital (spotted deer) is also very common in the forests of the Sundarban. The Chital is perhaps the most beautiful of all deer. Its coat is bright rufous-fawn profusely spotted with white at all ages and all seasons. They are seen in herds of 10-30, which contains 2-3 stags. They are seen in grassy forest glades, forest edges, woodland and shaded streams in moist and dry deciduous forests upto 1000 m. Average height is 36 in. (90 cm.) and weighs about 190 lb. (85 kg.)
The barking deers are small deer of the forests. They are noted for barking like dogs when alarmed and during the breeding season, and for having tiny antlers and tusklike canine teeth.

Apes and Monkeys

Primates also abound all over Bangladesh, but most abundantly in the Sundarbans and the Hill Tracts. Amongst the various species you will find the Hoolock Gibbon (the only ape in the subcontinent) as wells as langurs, and various species' of monkeys.
Hoolock gibbons mate for life and defend their territories with whistling songs that echo through the forests in the early mornings, giving rise to their nickname of the "singing ape."

Elephants

The elephant is mostly found in the wild in the Hill Tracts and is also a protected animal.
Elephant habitat in Bangladesh is confined almost entirely to the forested hills of the east, and even there habitat is giving way to monoculture plantations of teak, rubber, and tea.
Only 200-350 wild elephants are thought to survive, with herds moving between Bangladesh and neighbouring India.
There may be around 50 domestic elephants