Скачать или смотреть Nature and Life - Episode 170 (Endangered Mammals of Bangladesh) Part-1

Bangladesh is the world’s largest delta.
It has Bay-of-Bengal in its south.
And has Himalayan in its north.
Here, for such geographical conveniences, various seasons beautify ecosystems differently.
Diversified flora and fauna occur here due to seasonal diversity.
Once this country was very rich with wildlife.
But, since the beginning of the last century, this richness has been declining due to population growth and unsustainable development.
Gradual degradation of forests, wetlands and rural bushes has made wildlife endangered.
Besides, wildlife’s population has become fragmented due to climatic and environmental distress.
About 12 species of vertebrates have already disappeared from our nature, of which most are mammals.
The remaining species of mammals are also endangered in this altered environment.
Mammals usually need bigger space due to their physical structure, feeding habit, breeding system and habitat requirement.
Since supply for these demands has decreased in nature, wildlife are gradually being marginalised.
Yet many species of mammals are still surviving, including: Elephant, Tiger, Gibbon, Langur, Slow loris, Bear, Barking deer, Sambar deer, Hedgehog, Fishing cat, Otter, Ganges River dolphin etc.
Sundarbans has been declared as World Heritage Site for its rich biodiversity including Bengal Tiger.
Once this mammal used to be available throughout the country.
Now they are endangered and only surviving in Sundarbans.
The remaining Tigers of Sundabans are frequently facing various difficulties.
Another inhabitant of Sundarbans- Otter is also a mammal.
Though they can be seen in other places of Bangladesh, their largest population is in Sundarbans.
Otters are becoming endangered due to shortage of food and habitat.
Among 3 species of Otters, available in our country, Eurasian otters are now critically endangered.
Fishing Cats are also declining due to habitat shortage.
Small population of them can be seen in some forests including Sundarbans.
For food shortage and water pollution, they are leading a nomadic life in our country.
In search of food they often come to human territories and get captured or become roadkill.
Asian Elephants are the largest mammal roaming in Bangladesh.
Due to their size, they naturally need more food, bigger habitat and roaming ground than others.
As a result, they are now suffering as natural resources are gradually decreasing.
Presently Elephants are critically endangered in Bangladesh.
Whereas, once they used to be common in various forests.
Now a few of them are available in border areas of Jamalpur & Sherpur and in Hill Tracts.
This is mainly due to food shortage and human intrusion into their territories.
They often come to human territories in search of feeding and habitat.
As a result, conflicts occur between Human and Elephants – causing death for Elephants in most cases.
Hence, Elephants are gradually disappearing from this country.
Gayal is another large sized mammal of our country.
They are endangered all over the world.
They can be infrequently seen in some places of Hill Tracts of Bangladesh.
Gayal is the largest among cow type animals and it is critically endangered in our country.
Species of Primates of Bangladesh are now endangered due to paucity of food and habitat.
Gibbon, Slow loris and all 3 available species of Langurs are now declining.
Among them, Gibbon, Phayre’s Langur and Gray Langur are critically endangered.
Slow loris is the smallest among primates of Bangladesh.
They are tree-living nocturnal animal.
This mammal is critically endangered in Bangladesh.
Pollinator and seed disperser this primate is disappearing from our country due to food and habitat shortage.
Gibbons are a remarkable inhabitant of evergreen forest.
They roam in tall trees.
They are the only tail less primate of our country.
They can be seen in forests of Chittagong, Hill Tracts, Cox’s Bazar and Moulovibazar.
They live in group with male, female and their offspring.
Their groups usually contain 2-5 members.
Each group roam within a certain territory for feeding and shelter.
They are very cautious about the boundary of their territory.
They help in pollination and seed dispersal.
They are endangered throughout the world but are critically endangered in our country.
Gray Langur and Phayre’s Langur are also critically endangered mammals of Bangladesh.
Gray Langurs can be seen in areas near south-western Jessore district.
Their largest population can be seen in this region.
For shortage of jungle and trees they are now living around human habitats.