A Bigger Cowbird

I don’t know if this is one of the Brown-headed Cowbird chicks I saw in the last couple of weeks.

If not, it would be the third one I’ve sighted this summer. I’d never seen one before this summer.
As in the other cases, I heard this youngster calling for food before seeing it or its host Chipping Sparrow surrogate parent (who is glimpsed in the background of these shots).