I live in a row home in a small town outside of Philadelphia. My yard, including the house, is less than .1 acre. There is a creek and park a block away, so there are a good number of birds in the area, but I've done pretty good to find 64 species from this tiny spot. Last night as I was sitting on my back porch, a Green Heron flew past at dusk--number 65 for the yard. Since the house is up for sale and we are moving to New Jersey soon, will this be my last new bird for this yard?