Seen in abundance during the 1970s and the 1980s, sparrow numbers have dwindled over the years. The loss of greenery, the loss of habitat and the shortage of grains have resulted in the less number of sparrows. They are at the verge of extinction.
Earlier, houses had tiled roofs which had crevices. These crevices were important as sparrows build their nests there. The change in architecture destroyed the chances of s sparrow nest. The loss of greenery, combined with continuous pesticide spraying killed the caterpillars which were the main source of food for the tiny birds. Thus the complete food cycle is disturbed.
A third reason is the shortage of grains. The ecologist insists that there are spaces where the sparrow can still be found, though in lesser numbers.
Dr M.B. Krishna, a well-known ornithologist, said, “The government has failed to establish a full-fledged monitoring system for all kinds of wildlife, not just birds. Also, pigeons and sparrows are not in competition. Pigeons are ledge nesters and have moved in to occupy space left by sparrows as the city’s architecture is not conducive for them.”