The hole in the hedge

The hedge surrounding what used to be "the turkey farm" has grown in the 50 years since we lived next door, so close to what used to be the largest blueberry farm in the Commonwealth (or so we were told). How long has this hole been there? I didn't notice it on the last visit...Now, it's getting rather obsessive.
We whiz by in the car.
The camera is always at the ready, to catch ... what?