It is not that House Sparrows are "bad". It is that they are
adaptable to a HUGE cross-section of nest sites that MOST native
species do not utilize. That being the case, they produce HUGE
numbers of young each year that then return the following year to
OUTCOMPETE natives in the natives' narrow range of nest sites. For
that reason ALONE, I do not like to see them here, regardless of how
cute or fun they may be to watch. They do not belong here, and their
ability to adapt and FILL up areas that were delicately balanced over
hundreds of thousands of years by competing native species indicates
that they will survive: along with Rock Pigeons and other
non-natives, which also supplant native species. Do those who like
House Sparrows also NOT poison or trap House Mice and Roof Rats, and
have no care that cats and dogs wreak havoc on native wildlife (birds
and mammals, frogs and snakes, etc)? If so, then they have my pardon,
for at least they are consistent. Anyone, however, who objects to
non-native "pests" should include among that list those birds that
have been shown to supplant native birds: mute swans, starlings being
among the MOST detrimental... - Jim Greaves, MT