Dhaka, Nov. 6 -- Birds are very common in nature and almost everywhere in the world birds live. Every day we see birds in our surroundings. In the urban areas we see birds on buildings top and trees but in rural areas we see them everywhere and the places are the jungles, trees, bushes, ponds, rivers, water-bodies and vast agricultural fields. In the jungles, bushes and trees in rural areas we get different types of native birds singing and these places are full of wood-notes in the spring time. In many ways birds are helping us keeping functional environment and ecology. Without birds the vast desolation of agricultural fields looks barren. Birds' songs and wood-notes make us cheerful and amused. Environment and ecology are greatly influ...