Hasan

This is an adult bird. There are very few if any juvenile birds of any species this time of year- most, including Sandhill Crane, will have at least molted once. The reasoning behind the rust staining is just that- staining. Sandhill Cranes often get dirt and soil on their plumage, hence the reddish coloration.

The bird on the left has lost its tail, which is why it looks so different.

Ah, did not realize this was super old.

I'm not even convinced we can see the back of the bird- why not the underside with the talons visible? @EliGross used the color of the back as an ID feature but if we can't even agree that it's the back, I don't think we have any business trying to ID this to species. My impression on structure and what we can see is honestly Merlin, but at this level of crop and pixelation it's impossible to judge any color or pattern accurately. Perhaps there may be some with years of hawkwatch experience that can ID it conclusively solely by structure, but I'm not that person.

Willet

@Avery ? Let's keep this competitive. PS. the ranking is based on true percentage so they'll switch the moment you go over mine.

Due to the lack of webbing, I'm fairly certain this is a shorebird. I do wonder if Least Bittern could be a possibility, though it seems a little too dainty for that. Size is probably useful here, though I'll admit I don't often get to compare the size of GHOW and shorebirds, so it's not ringing any bells of the top of my head.

I'm not really understanding what you mean by squeaky as this doesn't sound squeaky to me at all, but here's the same call as your bird, incidentally also from Tennessee: https://macaulaylibrary.org/asset/129240221#_ga=2.215397396.269253878.1614787027-209356072.1610052628

No, this is a common call.

The main bird in this recording, including the loud bird at 30 seconds is American Robin, yes. But the real challenge is trying to pick out every species in the background. The ones I can hear obviously are Dark-eyed Junco, American Robin (in the background), Song Sparrow, Eastern Towhee, Carolina Wren, and European Starling/Brown-headed Cowbird.

Also, a great way to identify this species is to watch for its characteristic gentle downward wag of the tail.

Gray Flycatcher- notice the long bill and short primary projection

I'm no west coast birder but the first bird has rather dark primaries. I'd be inclined to go Herring x Glaucous-winged. I don't think the second is Thayer's, but again Glaucous-winged-ish.

Did you remove saturation/vibrancy from the image? I don't understand why the bird looks as if it's in black-and-white.

Nope. 1 is a House Sparrow, noticing that thick bill, 2 is a Chipping, and 3 js a White-crowned. 4 is indeed a Purple Finch.

I'm not going to speak to the ID of Chihuahuan Raven based on plumage as I've only had it a couple of times and I'm not super familiar with it. That said, I do know that it is an extreme habitat specialist, and thus is very unlikely to wander. The bird can go from extremely common to absent in 20-30 miles.

Wow, that'd be a lifer for me! Lucky

My impression is Peregrine but then again it's very hard to judge size.

Structure and patterning on back = Black-crowned.

Well... That didn't take long. Very impressive, @Avery! Try as I might, I can't get over 81%. I'm up to 500+ guesses at this point. I've lost a lot of my perfect 100s, just because sometimes my mind blanks/spelling error OR if you listen to enough you find a bird singing a really weird song. Here's my current chart. I can't wait to add more quizzes. I think I might work on a Western one tonight.

Yellow-rumped Warbler

Also FWIW, the contrast between the wings and body is something that's very common in Rusty, but in my experience not typical of Brewer's due to its glossy plumage overall.

At best, this is Brewer's/Rusty. I would definitely not call this Brewer's from these photos given the location. I'm curious why your reviewer thinks this is conclusively Brewer's? Habitat is not conclusive.

Blackpoll is pretty easy to pick out because it's a bunch of high-pitched staccato notes, compared to the longer noted, more complex songs of Cape May, Bay-breasted, or Blackburnian. It's not too variable either. I don't know how to describe Yellow-throated other than that to me it always sounds like it goes into slow motion as it progresses.

After 205 guesses, I'm at 79% which feels pretty accurate to my skill level. I tend to hover around the 78-81ish range. It's interesting that some species, like Palm Warbler and Yellow-rumped Warbler seem difficult for both me and Bird Nuts, where others that I struggled with like Yellow/Chestnut-sided Warbler Bird Nuts got perfectly. Also congrats to Avery for climbing those leaderboards. They're getting real close to me.