Miscellaneous Bird Farming
Bird farming is absolutely a very profitable business. The bird farming business is not a big thing, but one can make it big as there is not much competition in the market. However, like other pets, the demand of birds is not uniform.
Miscellaneous Bird Farming Image 1 
Miscellaneous Bird Farming Image 2
So, there need to do proper research about the business before commencing. Expensive birds like Macaw and others have the least demand, but they fetch a huge margin of profits. Besides, good species of pigeons and talking Mayna or Parrots have great demand everywhere in Bangladesh.