LC
Sanderling Calidris alba



Family: Scolopacidae (Sandpipers, Snipes, Phalaropes)

Authority: (Pallas, 1764)

Red List Category

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Justification of Red List category

This species has a very large geographic range size (extent of occurrence >13 million km2 in both the breeding and non-breeding seasons), and so does not approach Criterion B thresholds. It also has a large estimated population size (900,000 to 1,200,000 mature individuals), and so does not approach Criteria C or D thresholds. Although the data presented in Smith et al. (2023) indicate rapid declines exceeding 40% over three generations (c. 19 years), other populations are evidently not declining as rapidly. In the East Atlantic Flyway (including Western Europe), van Roomen et al. (2022) recorded an increase in abundance between 1979 and 2020, while the trend of birds wintering in SW Asia, Eastern and Southern Africa appears relatively stable (Nagy and Langendoen 2020). These latter trends represent a majority of the species' global range. Moreover, the data in Smith et al. are presented with significant bounds of uncertainty, and eBird data (Fink et al. 2023) suggest, in contrast to Smith et al., a stable population trend. Collating all available data, the global population of this species is estimated to have declined by 0-19% over the past three generations. Although the population is declining, it does not currently appear to be declining at a rate approaching Criterion A thresholds. Hence, the species continues to warrant listing as Least Concern.



Population size: 900000-1200000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 13,600,000 km2

Country endemic: no

Attributes
Realm - Afrotropical
Realm - Indomalayan
Realm - Nearctic
Realm - Neotropical
Realm - Oceanian
Realm - Palearctic
IUCN System - Freshwater
IUCN System - Terrestrial
IUCN System - Marine

Recommended citation
BirdLife International (2024) Species factsheet: Sanderling Calidris alba. Downloaded from https://datazone.birdlife.org/species/factsheet/sanderling-calidris-alba on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.