There's been a lot of new construction in the neighborhoods where I live and work. The city sets aside certain areas as "wildlife corridors"; the intention is to allow the local fauna some space to hunt, get access to water, breed, and get from one place to another without getting hit by a car. In the ten years that I've lived here, these corridors haven't gotten any narrower, but the edges have gotten a lot more defined as the houses have gotten closer.