COBIRDERS,
I’ve attached a number of photos showing different views/angles of the PURPLE/ROCK SANDPIPER. The very pale underwings and thick, white upperwing seem consistent with Rock Sandpiper (however I do not know about immature plumages of Purple Sandpiper). The bill and leg color and the overall face pattern look better for Purple Sandpiper.
Purple Sandpiper is more likely distribution-wise, but “birds have wings”.
Perhaps someone can forward the below link to Paul Lehmann since he has extensive experience with Rock Sandpipers in juv. and imm. Plumages.
Below is the link…you all can view and consult various references.
https://ebird.org/checklist/S120137387
Joey Kellner
Littleton, Colorado
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