Baird's sandpiper

Baird's sandpiper (Calidris bairdii) is a small shorebird. It is among those calidrids which were formerly included in the genus Erolia, which was subsumed into the genus Calidris in 1973.^[2] The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The English name and specific bairdii commemorate Spencer Fullerton Baird, 19th-century naturalist and assistant secretary of the Smithsonian Institution.^[3]

Baird's sandpiper
Baird's sandpiper (Calidris bairdii) foraging for insects
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Charadriiformes
Family:	Scolopacidae
Genus:	Calidris
Species:	C. bairdii
Binomial name
Calidris bairdii (Coues, 1861)
Range   Breeding   Nonbreeding   Passage
Synonyms
Actodromas bairdii Erolia bairdii

Description

Adults have black legs and a short, straight, thin dark bill. They are dark brown on top and mainly white underneath with a black patch on the rump. The head and breast are light brown with dark streaks. In winter plumage, this species is paler brownish gray above. This bird can be difficult to distinguish from other similar tiny shorebirds; these are known collectively as "peeps" or "stints".

One of the best identification features is the long wings, which extend beyond the tail when the bird is on the ground. Only the white-rumped sandpiper also shows this, and that bird can be distinguished by its namesake feature.

Standard Measurements[4][5]
length	180–190 mm (7–7.6 in)
weight	38 g (1.3 oz)
wingspan	430 mm (17 in)
wing	117.6–125.3 mm (4.63–4.93 in)
tail	50–57 mm (2.0–2.2 in)
culmen	20.5–24.5 mm (0.81–0.96 in)
tarsus	21.3–24.2 mm (0.84–0.95 in)

Ecology

Chicks on the ground, camouflaged

Eggs in a nest

Baird's sandpipers breed in the northern tundra from eastern Siberia to western Greenland. They nest on the ground, usually in dry locations with low vegetation.

They are a long-distance migrant, wintering in South America. This species is a rare vagrant to western Europe.

Baird's sandpiper might have hybridized with the buff-breasted sandpiper.

These birds forage by moving about mudflats, picking up food by sight. They mainly eat insects, also some small crustaceans.