The Bird Series consists of 21 varieties of stamps.

3DBirds: Hingeless 3D Prismatic Lenticular

Bird Series(mint): The bird series stamp was released on the theme Pheasants.

Birds of the World: The birds of the world consist of a sheetlet of 9 stamps

Birds of Bhutan 1998 was released on 1998

Birds of Bhutan was released on 1989

Birds of Himalayas was released on 1999

Birds (Singapore 95): It was released on 1995