Tony Leukering

Yes... and it's a Nuttall's Woodpecker.

It lacks an obvious buff surpaloral bar, the eye ring is quite narrow, and the upperparts are quite ruddy. Since the bird is in IA, it's probably not referable to Russet-backed Thrush. Ergo, it's a Hermit Thrush.

I realize that the eye ring is minimal, but the upperparts are awfully darned green. Why not Alder?

Juvenile Cardinals --Male or Female? Those are the options. ?

Tennessee Warblers have tiny, all-black, sharply-pointed bills. They also have bright green backs. It is not sufficient to find one or two field marks to make an ID. One must rule OUT all the other possibilities, so look at more than one or two features.

Yup

That was my Cimarron County first for BWHA.

You did not provide a location. SoCal? This is what juv LASP look like when they're a lot closer: https://macaulaylibrary.org/asset/354841131

Almost any bird can hold it's tail to create a notched look. With this odd pose and only one photo, I wouldn't trust it. We cannot see the mandible at all well enough to know the color of it, particularly given the overexposed background which makes dark things darker by comparison. Most of the head is shadowed relative to the rest of the bird, so I wouldn't trust this, either. All that said, it might well be a HAFL.

THIS

Almost anything is possible in fall migration: eBird Checklist - 26 Sep 2017 - Keyes (town) - 14 species (+1 other taxa)

PLVI has obvious white wing bars and obvious white supraloral bar connected to the eye rings creating spectacles. There are many, many bird species that sport eye rings, and most of them are not vireos.

Not "just" but it is a YEWA, with those huge yellow tail spots and strong yellow fringes to all wing feathers.

There’s a LOT more to the New World than just the US and Canada. As example, South America accounts for over half the >10K of the world’s bird species.

There are seven species of New World cardinals.