Friends,
First, I have not specifically reviewed my footage library for this bird.
I've never seen a juv. Rock Sandpiper look this orange on soft parts. The only thing I see which looks like a Rock to me is the color of the underwing.
However, I've found this is more variable than indicated.
Everything else screams Purple.
Congrats this is a great bird.
Tim Barksdale
Birdman Productions
Choteau, MT and Mokane, MO