Confirming two birds

[MtnAg08]

Saw these in Avon, CO today on my lunch walk. I've struggled with IDing female house sparrows (the males are so much easier) and I'm guessing that's what two of these are but looking to see if I'm right and finally starting to figure them out. I also have one that I think is an immature bird of some sort but not sure. I'm thinking maybe in the blackbird family? I've noticed lately I've been finding something I think might be new to me but it's usually a female or young bird of a species I've already seen the male of in the area and didn't know the difference. Thanks for yalls help!

[lonesome55dove]

The first three are juvenile Common Grackles.

The last two are female House Sparrows,

[MtnAg08]

Awesome thanks! Glad to know I was correct about female house sparrows. I think I might finally have them down! Also glad to know I was on the right track with a juvenile blackbird species. I was thinking maybe brown headed cowbird because there have been a bunch around and hadn't seen any grackles in a while. It seemed too big for brown headed though.

[Charlie Spencer]

It seemed too big for brown headed though.

Cowbird bills are much shorter than grackles.

[AveryF]

The last two are female House Sparrows,

I'm not positive on the sex, since they are juveniles (bright yellow gape)

[MtnAg08]

The last two are female House Sparrows,

I'm not positive on the sex, since they are juveniles (bright yellow gape)

So that explains the yellow. When I saw it in my first picture I thought maybe it was just a weird thing with the lighting but when I saw it on all the birds my pictures I realized it was something in their coloring. Another reason I was second guessing house sparrow as I hadn't seen that on them before. Thanks for mentioning that as it clears that up for me!