Unique tail, WA mountains

[birdnerd18]

While camping, I saw a small, mostly gray bird with pale yellow or olive on the rump. At first glance, I thought it was a flycatcher, but the tail and behavior threw me off.

The tail was almost as long as the bird‘s body and had an intricate black-and-white pattern. 

The bird would flutter over the surface of a creek and catch insects while using its tail to maneuver. Its flight reminded me of a hummingbird, but it was a perching bird. 

I didn’t get any pictures. :/ I’ve tried several bird search engines, but nothing’s come close. 

Thank you for helping if you can!

[Connor Cochrane]

Maybe a Yellow-rumped warbler. They have yellow on the rump, a black-and white tail, and often forage by Flycatching, or flying out, often over a body of water, snatching an insect, and returning to a tree.

Edited July 20, 2020 by Connor Cochrane

[The Bird Nuts]

I'll suggest Eastern Phoebe, which is a flycatcher with a long tail with yellowish underparts.

[Connor Cochrane]

13 minutes ago, The Bird Nuts said:

I'll suggest Eastern Phoebe, which is a flycatcher with a long tail with yellowish underparts.

I don’t believe EAPH are in Washington

[The Bird Nuts]

53 minutes ago, Connor Cochrane said:

I don’t believe EAPH are in Washington

Whoops, you're right.  I did not notice it was seen in Washington.

Edited July 20, 2020 by The Bird Nuts

[birdnerd18]

4 hours ago, Connor Cochrane said:

Maybe a Yellow-rumped warbler. They have yellow on the rump, a black-and white tail, and often forage by Flycatching, or flying out, often over a body of water, snatching an insect, and returning to a tree.

The bird very well could have been a female yellow-rumped warbler. Thanks for your help! :)

[Colton V]

Western Kingbird comes to mind

[Colton V]

6 minutes ago, Colton V said:

Western Kingbird comes to mind

Never mind, I don’t think they live in the mountains. Also, their tails are not very “intricate.”

Edited July 21, 2020 by Colton V