It is interesting that there are three kinds of Sparrows in Gangtok itself: House Sparrow Passer domesticus, Russet Sparrow Passer rutilans and Eurasian Tree Sparrow Passer montanus. However there is increasing menace of predatory stray and feral cats which are good at climbing trees and other places. This is something not easily noticed by lay people initially, but sparrow population in Forest Colony, Balwakhani has obviously and drastically declined due to them.  One can see House Sparrows roosting in the evenings in the lone Ficus tree on M. G. Marg, Gangtok.