A bird trapped in a rectangle

A sunny day in New York and we left the doors open to our balcony and suddenly I heard flapping, a sort of panic of wings, and a teenage robin was in the living room bumping off the ceiling. I guess he’d never experienced a ceiling before. We have mourning doves nesting on the balcony, the mama roosting on the nestlings, the papa out shopping for seeds, and a pair of mockingbirds has raised their…