There is a well-written article, by Veit and Jonsson, about identification of
small Calidris sandpipers in the SORA database from 1984 (article published in
American Birds). Least, Semipalmated, and Western are discussed, as well as a
few of the vagrant species. I think it is a good read...link below.
http://sora.unm.edu/sites/default/files/journals/nab/v041n02/p00213-p00236.pdf
Elisa Enders
Portsmouth, VA
