ID yellow-breasted bird, Colorado USA (Front Range) (1 Viewer)

[tenex]

I had a poor view of this medium to small perching bird from below on a cloudy evening, high in a deciduous tree. I saw a yellow neck/breast (with some darker or less bright spots) above a dark belly, a smallish dark bill, and an impression of something like a dark streak through the eye, or lighter areas above/below the eye -- not a uniformly colored head. Couldn't see the wings or back.

My only guess is a female Yellow-headed Blackbird, but I'm doubtful. It seemed smaller, closer to finch/warbler size. And the environment seemed wrong: there are plenty of blackbirds (Red-Winged) around the lake I visited, but that's a mile and a half away, and I've never seen one on the street here. Any other suggestions? (I don't think juvenile YHBs have fledged yet)

 

[BobbitWorm45]

Yellow-rumped Warbler?

 

[tenex]

Yellow-rumped Warbler?

No, thanks, I'd recognize that... and its breast isn't yellow.

I've looked at some photos and think it may have been a juvenile Yellow-headed Blackbird after all, or possibly a female. Why it was there I can't guess, but as Peterson once said, birds have wings.