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Measurements
Linear
See Appendix 1 . Wingspread in one male 595 mm (Van Tyne and Drury 1959).
Mass
See Appendix 2 . Males and females similar, immatures average slightly lighter than adults. Wintering birds in Washington and n. California weigh more than those in s. California and Peru; either adapted to maintain higher winter weight, experience better feeding conditions, or come from different breeding populations.
Paulson, Dennis R. 1995. Black-bellied Plover (Pluvialis squatarola), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/186
