In recent years, India has seen a dramatic decline of house sparrows

In recent years Indian ornithologists have observed a sharp decline in house sparrow (Passer domesticus) populations across West Bengal, Bangalore, Punjab, Rajasthan, Delhi and Haryana due to danger posed to their survival by a host of factors, such as lack of nesting sites due to modern architecture of building, and lack of seed and insect food. The aim of this paper was to investigate the possible causes for the decline of house sparrow in Sivakasi Taluk during December 2011 to December 2012. In Naranapuram (190 ± 4.89) and Duraichamipuram (83.33 ± 0.94) a high number of house sparrows were recorded. Moderate numbers of sparrows were found in Kalayarkuruchi (40 ± 1.63), Anaiyur (34 ± 1.63) and Pudhukottai (27.66 ± 1.24). The sparrows were completely absent in Achankulam and Alankulam. The house sparrow population was found to be higher in the rural areas when compared to the urban areas in the selected study sites.

Source:
Balaji et al. J. Pure Appl. Zool., 1(2): 160-166, 2013 (attached)