the mosquito multiplication has got nothing to do with the swiftlet . swiftlet feeds on pest and mosquito. u should be happy to hear swiftlet next to your house if i were u. maybe u haven't read much about swiftlet and maybe u should be ban in the first place for developing your house in their first house which were probably just jungle in those days. Well human being is not "tai sai" clearing lands away from animals and birds and than expect to be left alone , u might first want to clear away those big rodents like rats and cockroaches that live along with the dirty humans for the past century or so. Clean up the whole Penang beaches first la and don't shit into the sea lah for got sake.