[White-Rumpted or Western Sandpiper?]

millipede-

Afraid not. The only other shot I have is a direct head on.

[White-Rumpted or Western Sandpiper?]

I looked at everything I had. I have no other view that is the least bit clear. I did run Sleuth against another bird in the same photo and it came up with Western. This bird looks bigger and fatter than the other birds in the area.

[White-Rumpted or Western Sandpiper?]

I just ran iBird Sleuth which picked a White Rumpted with high probability. If was my guide, Capt. Dave Hunt, that suggested Western. Red Knot seems possible also. 

[White-Rumpted or Western Sandpiper?]

Everglades National Park. Feb 6, 2019. Western Sandpiper or White-Rumpted?