Breeds on open tundra, generally near water. Winters and migrates along mudflats, sandy beaches, shores of lakes and ponds, and wet meadows.Back to top
|Clutch Size:||4 eggs|
|Number of Broods:||1 brood|
|Egg Length:||1.1-1.2 in (2.91-3.09 cm)|
|Egg Width:||0.8-0.9 in (2.08-2.18 cm)|
|Incubation Period:||19-22 days|
|Condition at Hatching:||Active and covered with down.|
The Semipalmated Sandpiper has three North American breeding populations: western (Alaska), central (western Canadian Arctic), and eastern (eastern Canadian Arctic). A 2012 study estimated a total population of 2.26 million breeding birds, with 1.45 million in the western population, and 810,000 in the central and eastern populations. Population trends have fluctuated over the last several decades. Overall, it appears that the Alaskan and central populations are currently stable, with possible increases in some areas, and the eastern population is declining. Semipalmated Sandpiper is on the 2014 State of the Birds Watch List, which lists bird species that are at risk of becoming threatened or endangered without conservation action. Back to top
Andres, B. A., P. A. Smith, R. I. G. Morrison, C. L. Gratto-Trevor, S. C. Brown, and C. A. Friis (2012). Population estimates of North American shorebirds, 2012. Wader Study Group Bulletin 119:178–194.
Hicklin, Peter and Cheri L. Gratto-Trevor. (2010). Semipalmated Sandpiper (Calidris pusilla), version 2.0. In The Birds of North America (P. G. Rodewald, editor). Cornell Lab of Ornithology, Ithaca, New York, USA.
North American Bird Conservation Initiative. (2014). The State of the Birds 2014 Report. US Department of Interior, Washington, DC, USA.
Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, Jr. Ziolkowski, D. J. and W. A. Link. The North American Breeding Bird Survey, results and analysis 1966-2013 (Version 1.30.15). USGS Patuxtent Wildlife Research Center (2014b). Available from http://www.mbr-pwrc.usgs.gov/bbs/.
Sibley, D. A. (2014). The Sibley Guide to Birds, second edition. Alfred A. Knopf, New York, NY, USA.