Black & white birds Rocky Point Sonora MX (1 Viewer)

Seen near Rocky Point (Puerto Penasco) MX Oct 26, 2019

I think they are all 3 the same species but I could be wrong. I am not seeing anything in Merlin that looks like these.

Help please. Thank you, thank you!

I think you need to look at gulls. The last image reminds me of a laughing or Franklins gull in breeding plumage - only problem is that it's the wrong time of year

Niels

Killdeer?

Killdeer was my first thought looking at the first photo.

I think the tail length on 2nd bird (1st image) supports Killdeer.

Cheers

Thank you all for your input! My apologies for the pause. Birdforum is set to notify me once a week so I didn't realize there had been replies. My bad!

I did look at gulls. Merlin brings up every bird that would be black & white, crow to crow+ size, and on the the ground or swimming/wading. I've changed the parameters to try to get different results and maybe stumble into it. CA gulls show some gray backed/headed but I remember this being black rather than gray. Same with what I am seeing on the Herring gulls. Some images I'm seeing of the Laughing gulls have the gray or very dark backs but there is white flecking in them. Maybe I am not finding just the right image.

RE the killdeer:
We saw a lot of those on the golf course. They were definitely brown on the back and I recall this being clearly black. And these birds were bigger than the killdeer we saw.

I've been wondering (especially considering the solo bird) if these could be Black-necked stilts and I can't see the color/length of the legs due to the bank.

What do you all think? Is that possible?

Bird in right hand pic must surely be a plover. Killdeer looks a good bet

Sorry, it has been so long since I saw a killdeer that I had forgotten it has such a strong white band around the back of its neck. Additionally, these images must be very high contrast given how black the head looked

Niels