Climate change and man-made adverse environment have so far caused extinction of 13 species of animal and endangered 800 other species in Bangladesh.

Wildlife Trust of Bangladesh (WTB), a national institution committed to conserving the biological diversity of Bangladesh, said the extinct animals are: peacock, crocodile, wolf, wild buffalo, nilgai and rhinoceros, national news agency BSS reported on Wednesday.

Chief Executive Officer of the WTB Anwarul Islam said half of the country's 1,600 species are endangered.

Emphasizing the need for protection of biological diversity, he said political and social commitment are needed in this connection, otherwise 150 more species will be extinct gradually.

The endangered species include 50 species of fish, 41 species of mammal, eight species of amphibian and 58 species of reptile.

At present, the South Asian country has 708 species of fish, 22 species of amphibian, 126 species of reptile, 528 species of bird, 113 species of mammal and 3,006 species of algae.