An Interspecific Mixed Clutch of Semipalmated Sandpiper and Lapland Longspur Eggs

Christine M. Anderson; Fletcher M. Smith; Paul F. Woodard

doi:10.1675/063.039.0301

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Christine M. Anderson,^1,* Fletcher M. Smith,² Paul F. Woodard³

¹1Biology Department, Acadia University, 33 Westwood Avenue, Wolfville, Nova Scotia, B4P 2R6, Canada
²2The Center for Conservation Biology, College of William and Mary & Virginia Commonwealth University
³3Canadian Wildlife Service, P.O. Box 2310, Yellowknife, Northwest Territories, X1A 2P7, Canada

^*Corresponding author; E-mail: christineanderson@acadiau.ca

Abstract

Semipalmated Sandpipers (Calidris pusilla) and Lapland Longspurs (Calcarius lapponicus) share similar nesting habitat preferences on small islands in the Mackenzie River Delta, Northwest Territories, Canada. A Semipalmated Sandpiper was observed incubating a mixed clutch of its own eggs with two smaller eggs presumed to be from a Lapland Longspur. This is a unique combination of a precocial and an altricial species' eggs in the same nest. Possible explanations for the occurrence of this interspecific mixed clutch include nest parasitism, accidental laying, opportunistic egg dumping, or nest usurpation.

Citation Download Citation

Christine M. Anderson, Fletcher M. Smith, and Paul F. Woodard "An Interspecific Mixed Clutch of Semipalmated Sandpiper and Lapland Longspur Eggs," Waterbirds 39(3), 323-326, (1 September 2016). https://doi.org/10.1675/063.039.0301

Received: 25 March 2016; Accepted: 1 April 2016; Published: 1 September 2016

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