As I've taken walks in nearby parks this spring I've gotten so aggravated on behalf of the birds and pollinators that I've sent an opinion piece to a local paper. Trees and grass alone may be great for humans, but don't suffice for non-human members of the biotic community. Such public spaces are what I call "faux green." You can read the piece here at the Wednesday Journal.
Planting native trees, flowers, and (especially) shrubs in parks and other public spaces is one of the best ways any community can improve its green infrastructure and improve ecosystem health. Of course that also means no pesticides.
Many cities and towns have gotten this message and are actively planning green spaces that support birds and pollinators and other wildlife. A good source for urban wildlife habitat news and information is The Metropolitan Field Guide. I like the MFG's Facebook page, too--many good links.
How are the parks in your neighborhood? Are they completely anthropocentric, or do they support biodiversity?