Hasan

I'm fairly certain this is not a Rufous, considering, for one, the lack of any rufous with at best (perhaps) a barely visible slight buffy wash on the flanks. That said, it's generally more helpful to say why you think an ID is correct rather than simply claiming that it is.

Definitely not a Broad-tailed, which has an elongated look. I'll concur with Anna's

The first bird strikes me as a Sharpie, and the last is a Red-tailed Hawk. All the rest are Red-shouldered Hawk, other than the Turkey Vulture, of course.

4 is definitely a Swamp.

Yup, I believe the underwing pattern alone is distinctive.

I think the photo has been edited to increase the saturation. The chromatic aberration is really bad, and none of the colors in the photo seem trustworthy.

Crow was my impression as well

Agreed, it's definitely a Red-tailed Hawk. In the southwest (outside of California), Swainson's does not typically start moving until April. A bird this far north this time of year would be highly unusual and would require it to be at least 2-3 weeks ahead of schedule. There's only a handful of March records in the state and no birds from February.

Are all the photos of the raptor the same bird? The first two photos don't look like a Sharpie to me

Ah, I missed that. So yes, it's Ruby-throated. Pretty textbook GISS and bill shape too but I thought it better safe than sorry.

I imagine that's a bill deformity.

The fourth bird (and perhaps the second, though I'm fairly certain it's Ruby-throated due to the bill) is a little ambiguous imo. Otherwise, I agree with your IDs.

It's certainly Red-breasted-ish, but considering both the facial patterning and the weird back patterning it's unclear enough that (as a non-west-coast birder), I would probably leave it as sapsucker sp. just to be safe.

lol 1 is definitely not an ATSP, considering the location is coastal cali. Rufous-crowned Sparrow is correct. edit:sniped

That was my impression too- they are almost as dark as black duck. Definitely not a standard Mexican by any means.

I don't know where in SC you are located, but here's a map from eBird showing observations of Gannet. The red pins are recent sightings. You will almost certainly not see Northern Gannet inland, but looking out over open ocean they can occasionally come very close to shore, though often they are a decent ways out. They are much easier to see from land than many seabirds.

No, dead birds are not countable. That said, it should be fairly easy to see a live Northern Gannet- they are common along the east coast, including the Carolinas. I got my lifer in North Carolina.

That's literally my earlier post copied. I thought it had a chance of being California, but I suppose the legs are quite bright pink...

Carolina Wren

1 is Hooded Mergansers, 3 a Red-shouldered Hawk, and 4 are Gadwall. Here's a lightened version of 4.

Yep- as I noted in a previous thread, the light window on the inner primaries is a good field mark.

Yes

You may be right, but the bird is quite worn/bleached and only in the last photo looks sufficiently contrasty to my eye.

Yes- the pale window on the primaries is a good field mark.

Your instinct is right- Herring!