Hitchcock in reverse - the birds are inside the buildings, the humans outside.
It reminds me of when we once sold a house. As we left, I placed a blow-up alien, with classic alien looks, to look out of the upstairs window, as the new owners were not moving in for a week, and the house needed protecting. Somewhat surprisingly, the new owners took exception to this, and complained to their solicitor. Photographs were taken, and a stern letter sent to our solicitor regarding a "life-size" alien in the bedroom. Our solicitor thought it the most amusing letter of complaint he'd ever had. I only wish we had taken a photograph of the house when leaving.
I wonder how they knew it was life sized?