Eastern Chipmunks (Tamias striatus) are few and far between in Green-Wood. I see them there rarely, but the other day a wren-brown spot in the distance, which I thought might, in fact, be a wren, turned out to be this one.
There are rather more Chimpmunks in Prospect Park. The closest these two green islands in Brooklyn come is just over half a mile. Windsor Terrace, the neighborhood in between, is not a wildlife corridor. A friend who lives in Windsor Terrace calls it Alpine Brooklyn, because it is between the two highest spots of elevation in the borough.
Backyard and Beyond 
I heard about Eastern Chipmunks in Prospect Park but did not know they were in Greenwood Cemetary!
My daughter, SIL and three grands live in Windsor Terrace (now). The grands are pretty wild, especially with the quarrantine.