Western sandpiper

The western sandpiper (Calidris mauri) is a small shorebird. The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The specific mauri commemorates Italian botanist Ernesto Mauri (1791–1836).[2]

Western sandpiper
Western Sandpiper.jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Scolopacidae
Genus: Calidris
C. mauri
Binomial name
Calidris mauri
(Cabanis, 1857)
Calidris mauri map.svg

Ereunetes mauri
Erolia mauri

This is one of the most abundant shorebird species in North America, with a population in the millions.


Adults have dark legs and a short, thin, dark bill, thinner at the tip. The body is brown on top and white underneath. They are reddish-brown on the crown. This bird can be difficult to distinguish from other similar tiny shorebirds, especially the semipalmated sandpiper. This is particularly the case in winter plumage, when both species are plain gray. The western sandpiper acquires winter plumage much earlier in the autumn than the semipalmated sandpiper.


  • Length: 5.5-6.7 in (14-17 cm)
  • Weight: 0.8-1.2 oz (22-35 g)
  • Wingspan: 13.8-14.6 in (35-37 cm)


Their breeding habitat is tundra in eastern Siberia and Alaska. They nest on the ground usually under some vegetation. The male makes several scrapes; the female selects one and lays 4 eggs. Both parents incubate and care for dependent young, who feed themselves. Sometimes the female deserts her mate and brood prior to offspring fledging.


They migrate to both coasts of North America and South America, as well as the Caribbean. It is a very rare vagrant to western Europe.


These birds forage on mudflats during migration and the non-breeding season by probing or picking up food by sight. Foraging occurs on tundra and wet meadows during the breeding season. They mainly eat insects, small crustaceans, and mollusks.


  1. ^ BirdLife International (2012). "Calidris mauri". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  2. ^ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 84, 243. ISBN 978-1-4081-2501-4.
  3. ^ "Western Sandpiper Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-27.

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