Geographical distribution of Semipalmated sandpiper.    Breeding  Migration  Nonbreeding
BirdLife International. 2016. Calidris pusilla. The IUCN Red List of Threatened Species 2016: e.T22693373A93400702. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22693373A93400702.en. Downloaded on 15 June 2018.
Cephas