I think that once the babies fly out of the nest for the first time, it's the last time. They don't fit anymore, and they are outta there. You might see them out on the lawn with their parents sometime; funny, at one point they can look as big as the parents!

edited to say, I just noticed you also posted in Bird Watching, I'll defer to those who actually know something about birds!

Maybe a yellow bellied fly catcher?

Not only do they not fit any more in some areas nests become overrun with various mites. If a baby can not leave the nest the die a horrible death.

If the eye ring was more distinct you might look up vireo's there are several types and the females often do not look like the males.

I should have stated my locale. I am on the Central Coast California, close to Santa Cruz up in the mountains.

Hmmm.....I'm stumped. What part of the country do you live in? The things I'm noticing the most are it's light lower beak, its eye ring, and the yellow. Wait....I just looked some things up and it looks like maybe it could be a yellow bellied fly catcher? But I'm thinking the nests of those are built closer to the ground. I'm sure some of our experts here would know. It's a pretty bird!

Okay..........my bird books don't cover a lot of the west coast birds, so I may be wrong. I found a map and it looks like it's only more eastern. But look at the images for that bird, and it looks like yours.

I think it might be a tyrant flycatcher, since the yellow bellied flycatchers do not live in California.

Maybe a Say's Phoebe ?

Say's Phoebe

Lars - After looking at lots of photos, you might be right.

Ok forget my answer of Yellow bellied flycatcher. I didn't realize you were in CA. I think Lars may be right.

Maybe a Hammond's Flycatcher? They are found in northern California. I don't see a tyrant flycatcher in my Audubon Field Guide.

Tyrant Flycatcher is the family name. Could be a Pacific Slope Flycatcher or Hammond's, but the PSF appears to be more yellow. Both are in the Tyrant Flycatcher family. https://www.audubon.org/field-guide/bird/pacific-slope-flycatcher

I agree with Pacific-slope Flycatcher. They often nest in association with bridge or buildings.

Olychick, thank you for that clarification!! I just went back to the field guide and saw the listing of "Family". I guess I hadn't really noticed that before. Thanks a lot!!

LOL Vinmarks......we must have been writing at the same time above, because I didn't see your guess. Yeah, I didn't know at that time either that she lived in CA. Glad the mystery was solved.

Me too, catherinet. Weird. No guess on the bird.

I see "cauliflowerluver" too and I picked that name! Too lazy to change.