[order] Charadriiformes | [family] Scolopacidae | [latin] Calidris ruficollis | [UK] Red-Necked Stint | [FR] Bécasseau à col roux | [DE] Rotkehl-Strandläufer | [ES] Correlimos Cuellirrojo | [IT] Gambecchio collorosso | [NL] Roodkeelstrandloper

Roodkeelstrandloper determination

copyright: G. Dabb

Chestnut lower face, throat and upper breast. White around bill base and on part of supercilium. Crown and upperparts have chestnut, black and white markings contrasting with grey upperwing. Underparts white. Resembles C. minutaa , but slightly larger.Slightly shorter legs and rather longer wings. Bill shorter and Thicker. Female averages slightly larger in wing and bill.

Low altitude montane tundra in subalpine belt, on mossy and scrubby tundra, usually in rather dry and raised areas. During non-breeding season, mostly coastal, on intertidal mudflats, shelltered inlets, bays and lagoons, but also commonly on wide variety of freshwater, brackish and saltwater wetlands. Occasionally on sandy beaches and rocky shorelines.

Breeds in Siberia, from Taymyr peninsula east to Chukotskiy peninsula, also occasionally in western Alaska. Accidental in Britain, France, Belgium, Netherlands, Germany, Denmark, Sweden, Finland, Italy.

On breeding season mainly beetles, insect larvae, Hymenoptera and tiny seeds. May forage far from nest in wet habitat. Outside breeding season, small invertebrates, such as polychadgd worms, crustaceans, insects and molluscs, also seeds. Constant pecking motion, like C. minutaa, probes in sediment to depth 2 cm, or jabs, also gleans. Feeds in dense flocks. Birds spread out during feeding, but come together when flushed.

This species has a large range, with an estimated global Extent of Occurrence of 100,000-1,000,000 km². It has a large global population estimated to be 320,000 individuals (Wetlands International 2002). Global population trends have not been quantified, but the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e. declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern. [conservation status from birdlife.org]

Egg layng in June-July. Pairs bond Monogamous. Low degree of site fidelity. Nest is a shallow depression lined with leaves and grass. 4 eggs are laid in a single brood, but replacement clutches are recorded. Incubation 20-22 days, by both parents. Female leaves soon after hatching and male usually tends chicks up to fledging.

Migratory. Probably moves in large flocks. uses several stopovers, mostly on coasts of Japan, Korea, SE China, Taiwan, Hong Kong, Vietnam, Malaysia, Indonesia, New Guinea, Philippines and W Micronesia; migrating flocks crossing Pacific often stage on islands. Some Siberian birds move overland and cross Krasnoyarsk, Irkutsk and Buryatskaya regions; some cross Mongolia, Manchuria and Ussuriland; others W to E Kazakhstan. Most of population breeding in Alaska appears to pass through Aleutian and Pribilof Is to migrate with Siberian population; some spend boreal winter in the Americas. Australia reached by late Aug and Arrivals continue until Nov; juveniles arrive latest and may use different route; departure mainly Mar-Apr. Immatures usually remain in non-breeding range throughout 1st year, often moving inland after rains fill wetlands. Adults show high fidelity between years to non-breeding sites.