A species of drongo, not seen by experts in the country before, has been spotted in Rajshahi city's Shimla Park recently.
The bird, found by a group of bird-watchers, has a distinctive white belly and vent.
After examining its size, black upper side gradually fading into a shade of brown and other features, ornithologists identified it as an adult white-bellied drongo.
“The discovery means that the bird has now extended its habitat to Bangladesh, which is very important to the country's natural biodiversity,” eminent ornithologist Reza Khan, who scrutinised the pictures taken by bird-watchers, told The Daily Star.
Known as Dicrurus caerulescens, the bird is believed to be a resident of India and Sri Lanka, he said.