In light of the other comment about ample green space in Bern, and how songbirds have refuge because of it, we should consider whether cats killing songbirds is

In light of the other comment about ample green space in Bern, and how songbirds have refuge because of it, we should consider whether cats killing songbirds is a more suburban phenomenon, and if so, why. Given that both cats and songbirds have been around for much longer than suburban lifestyles, could the flatness of nothing-but-Kentucky-Bluegrass lawns be to blame?