CLOSED: Shorebirds - Help ID

I have a few shorebirds that I would appreciate your assistance. I have a great deal of difficulty identifying shorebirds because many of them look the same (to me).

Thanks.

Another shorebird .........

I think these shorebirds are some of #1 and #2 ......

This one I may have posted some time ago with no definitive ID.

#1 - Sanderling
#2 - Ruddy Turnstone
#3 - Sanderlings (pale) and Purple Sandpipers (dark)
#4 - Willet

For the differences between Turnstone and Purple Sandpiper, note the short, straight, all black bill, bright orange legs and white rump of the former, and the longer, slightly curved, yellow-based bill, muddy-yellow legs, and no white rump of the latter. Turnstone is also a bit larger, but that's only obvious when you see the two next to each other.

Resin

Thank you so much, Resin. I appreciate it ......

This one looks different ?

I think this is a small flock of them .....

Yep, Dunlins

Resin

Thank you, once again, Resin .......