The leaf and grass-lined nests of C. pusilla are typically built on wet arctic tundra near lakes or on grassy dunes at low elevations (Terres 1980). Eggs are yellow, tan or olive with cinnamon, hazel or chestnut colored spots (Terres 1980). Clutch size is generally four per nest, suggested by some studies as the maximum number of hatchlings that can be successfully protected by the parents (Safriel 1975). Both parents incubate the eggs until they hatch, a period of about 18-22 days, at which time the females usually vacate the nest and leave the males to brood the hatchlings (Safriel 1975; Terres 1980). Most young are capable of flight 14-19 days after hatching (Terres 1980).Voice: Semipalmated sandpipers emit a variety of calls, depending on the circumstance. During flight, vocal communication consists of a loud cherk, chert, or chut, which may be doubled. Breeding adults produce a "motorboat" song followed by buzzing. All calls are lower and lack the ee characteristic of the least and western sandpipers (Peterson 1980; Terres 1980; Paulson 2005). Temperature &
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