By odd coincidence, I saw again this morning the redtail that hangs out around Waban Square, smack dab in the middle of a T-accessible Boston suburb. Why wouldn’t hawks, coyotes, etc. hang out where there is a proliferation of squirrels?
After moving to the “wilds” of NH (Hillsboro, not Keene, where I lived across the street from a large state forest), I marveled that I’d seen more birds when I lived in Cambridge, MA and went birding at Mount Auburn Cemetery. At Mount Auburn, the birds were concentrated into a relatively small area; they fed largely in short, well-trimmed trees; and there were hordes of birders out there looking for them, so if you didn’t spot something interesting, someone else would.
In NH, I had to find my own avian needles in a well-forested haystack, which I suspect is why you see more critters in town than you do in Plummer’s Hollow. With all that space to spread out in, the wildlife in Plummer’s Hollow can avoid humans. In town, hawks etc learn to ignore rather than avoid.