akandula

Nice photos! Yes, this is a nonbreeding male Scarlet Tanager on migration. Nonbreeding males look like females, but have darker black wings and tail. Note the stout bill and stocky appearance.

Definitely young Peregrine. Like you were saying, it's far too bulky to be a Merlin, it has a very strong mustache stripe, and has a large beak.

Say's Phoebe. Vermilion Flycatchers are less bulky, have a more vivid red belly, and have a streaked white breast that Say's Phoebes lack. Yes, male Wilson's Warbler. Note the yellow overall and black cap. A very nice Red-shouldered Hawk Yes, adult Cooper's Hawk. Note the capped appearance.

This is a Field Sparrow. Note the pink conical bill, plain face, thin white eyering, and rusty crown and eyeline.

This is actually a Chipping Sparrow. The black eyeline that goes through the eye all the way to the bill is a diagnostic ID feature (a Clay-colored’s eyeline stops at the eye and doesn’t go to the bill).

This actually looks better for a nonbreeding adult/immature Tennessee Warbler. Note the green back, pointy bill, conspicuous pale eyebrow, dark eyeline, white undertail coverts, and unstreaked underparts. Blackburnian Warblers would have pale streaks on the back, a distinctive triangle ear patch and more streaking on the flanks.

Just to clear up some confusions for bpresby: On the towhee, note the buffy face. Abert’s Towhees would have a pale bill contrasting with a dark face. Notice the really curved culmen (top of the beak) on the female/immature House Finch, as well as the blurry streaking (not crisp) which sets it apart from other similar finches. Gila Woodpeckers would show a black-and-white (not brown) back and lack the spotted belly of Northern Flickers.

Agreed on 1-3. The flicker is definitely Northern. Gilded would show yellow (not red) under the tail/wings. I’d be leaning “Red-shafted” Northern Flicker — the color of the head and wings/tail match, but I can’t really see the nape, so I can’t safely rule out an intergrade.

Yes, that looks like a Bell's Vireo.

3, 5, and 7 are Say's Phoebes. Vermilion Flycatchers are less bulky, have a more vivid red belly, and have a streaked white breast that Say's Phoebes lack.

The Mexican Mallard subspecies and the normal Mallard were split in 2018. The Mexican Mallard is now called the Mexican Duck.

This is an Abert's Towhee. To separate it from other sparrows, note the drab grayish-brown overall, dark face, pale bill, and orange undertail.

1. 3. and 4. Tennessee Warblers 2. Blackpoll Warbler?

Lincoln’s, due to the buffy wash and crisp, thin streaks on the undersides.

Female/immature male Mourning Warbler - note the gray hood, faint partial eyering, pink legs, and lack of wingbars. I’d actually call that an Ash-throated due to the shape/color of the bill and tail, but wait for more opinions. Yes, a Least Flycatcher due to the gray, compact appearance, bold eyering, and short primary projection.

This is an immature Sharp-shinned Hawk due to the thick brown streaks on the underside, long, thinly barred tail, and small head. Cooper's would be less compact with thinner, more concentrated streaks and Merlins would have dark eyes.

This is actually a Red-eyed Vireo. Note the olive-green above, whitish below, no wingbars, dark stripes through the eye and above the eye, thick bill, and white eyebrow. The red eye is not always easy to see due to the lighting. Tennessee Warblers lack the black stripe above the eye and have a thinner bill.

Yes, Ruby-throated. It’s the only common hummingbird in your range.

Agreed, definitely a Yellow Warbler. Note the unique yellow undertail (which is mostly in the shade in this picture).

Oh, trust me, I've gotten worse. I think those photos are the ones that give the most pleasure to birding -- when you really test your skills to confirm an amazing lifer/rarity. Congrats!

Pine Siskins confirmed. Note heavily streaked, brown overall, the small amount of yellow on the wings and the tail, and the sharp, pointed bill. To differentiate it from sparrows and other finches, note the usually thinner bill, yellow tones on the wings, and heavily streaked overall. This species often forage in flocks.

Welcome to Whatbird! I agree with a Carolina Chickadee. Note the tiny size, short bill, contrasty white cheeks, black cap and throat, and gray overall. The similar Black-capped Chickadee lives further north.

Yes, that's a Gray-cheeked Thrush, probably in the middle of migrating to South America. Note the very faint eyering and plain gray face. It's too gray overall to be a Bicknell's, lacks the buffy face/eyering of a Swainson's, and lacks the reddish tail of a Hermit. I hope it'll be okay! It still has to fly for a long time...

Welcome to Whatbird! This is a Red-tailed Hawk. Note the dark "belly band" and pale breast, characteristic of this species.

Seen in Calgary, Alberta, Canada in August. Surrounded by Lessers. Was thinking Greater as it would be a lifer, but now I'm doubting due to the nail size. Thanks in advance!