We're assuming the loss affects all bird species uniformly and that location (urban, suburban, rural, shore, etc) does not matter. I'm not an expert, but I wo

We're assuming the loss affects all bird species uniformly and that location (urban, suburban, rural, shore, etc) does not matter. I'm not an expert, but I would guess both have an impact on losses. Migratory (either regional or long distance) likely has a part in it as well.