Thank you for letting those birds out since you weren’t sure. Many people kill native birds I’m afraid. House finches have stripes on their chest. The female house sparrow does not. I’ll get to my computer and show you some photos. But in a nutshell a female house sparrow has a light colored chest,NO stripes on the chest, No spot on his chest.
So sorry about your male bluebird. We all know how you feel! It’s awful to find.
Tammy