The chronology of nesting events was examined in Western Sandpipers (Calidris mauri) and Semipalmated Sandpipers (C. Pusilla) breeding at Nome, Alaska. The duration of laying (5 d for a 4-egg clutch) and hatching (53. 0 ± 26. 6 SD h, dry chicks to emerge from star-pipped eggs) was similar for both species. Laying rate of Semipalmated Sandpipers at Nome were slower than other populations, possibly because laying intervals were greater than 30 h.
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