The Oriental Magpie-Robin (Copsychus saularis) is a small passerine bird considered as an Old World flycatcher. These birds are spotted in Indian Subcontinent and parts of Southeast Asia. They were favorite as pets as they were popular for their sing song calls. They are black and white birds with a long tail that is held upright as they forage on the ground or perch conspicuously. The Oriental Magpie-Robin is national bird for Bangladesh.
Source: Wiki