Brajesh Mahant - Jhiri-Bajaura Himachal Pradesh Himachal Pradesh

Finally a sparrow couple choose my house for their nest. like their forefathers, after the gap of about 25 years. I am very happy. I enjoy their chirping, which I heard after about 25 years. Thank God they are back. Although one couple. I am hoping a large number.
What was the reason behind their disappeance, may be pollution, changing pattern of agriculture, rise in tempreture, changing pattern of construction, struggle with other birds. It is the matter to be taken very seriously as they are symbolising that this area is no more suitable for living. So they are vanishing. How long we Hard skinned animals will survive ?