Controlling house sparrows to promote native species: Just a few mating pairs of European house sparrows (Passer domesticus) were introduced in Brooklyn, NY in 1851. Today, their number has reached 150000,000 in the United States alone and they range all the way from Canada to South America. These aggressive little birds adapt well around humans and not only compete with native species for nesting sites, but will also destroy eggs of native birds. This year I put up several different nesting box

Two little sparrows on the wall mating… | Carlosmanwelly