Fauna of Bangladesh

The fauna of Bangladesh includes about 1,600 species of vertebrate fauna and about 1,000 species of invertebrate fauna based on incomplete records. The vertebrate fauna consists of roughly 22 species of amphibians, 708 species of fish, 126 species of reptiles, 628 species of birds and 113 species of mammals. The invertebrate fauna includes about 30 species of aphids, 20 species of bees, 178 species of beetles, 135 species of flies, 400 species of spiders, 150 species of lepidopterans 52 species of decapods, 30 species of copepods, 2 species of starfish, and some species of sand dollars, sea cucumbers, and sea urchins.

Bangladesh's wide variety of ecological conditions, encompassing the long sea coast, numerous rivers and their tributaries, lakes, haors, baors, ponds and other forms of wetlands, lowland evergreen forests of tropical nature, semi-evergreen forest, hill forests, moist deciduous forests, swamps, and flat lands with tall grasses, has ensured the vast diversity of species found in the country. However, the increasing population, unplanned urbanization and expansion of agriculture and industry have been significantly affecting the ecological structure of Bangladesh, leaving several species extinct and many others endangered.