Calidris bairdii 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Charadriiformes Scolopacidae

Scientific Name: Calidris bairdii (Coues, 1861)
Regional Assessments:
Common Name(s):
English Baird's Sandpiper
French Bécasseau de Baird
Taxonomic Source(s): SACC. 2005 and updates. A classification of the bird species of South America. Available at: #

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ashpole, J, Butchart, S., Ekstrom, J.
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend is not known however it is not thought to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Previously published Red List assessments:

Geographic Range [top]

Countries occurrence:
Argentina; Belize; Bolivia, Plurinational States of; Brazil; Canada; Chile; Colombia; Costa Rica; Ecuador; El Salvador; Falkland Islands (Malvinas); French Guiana; Greenland; Guatemala; Honduras; Mexico; Panama; Paraguay; Peru; Russian Federation (Eastern Asian Russia); Saint Pierre and Miquelon; Suriname; United States; Uruguay; Venezuela, Bolivarian Republic of; Virgin Islands, British
Antarctica; Aruba; Australia; Austria; Barbados; Bermuda; Cayman Islands; Czech Republic; Denmark; Dominica; Finland; France; Germany; Greece; Iceland; Ireland; Israel; Italy; Japan; Namibia; Netherlands; New Zealand; Norway; Oman; Poland; Portugal; Saint Lucia; Saint Vincent and the Grenadines; Senegal; South Africa; South Georgia and the South Sandwich Islands; Spain; Sweden; Trinidad and Tobago; United Kingdom; Virgin Islands, U.S.
Present - origin uncertain:
Antigua and Barbuda; Guadeloupe; Martinique; Montserrat; Puerto Rico; Saint Kitts and Nevis
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:7460000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):2500
Upper elevation limit (metres):4700
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The global population is estimated to number > c.300,000 individuals (Wetlands International 2015). The European population is estimated at 500-1,000 pairs, which equates to 1,000-2,000 mature individuals (BirdLife International 2015). The population in Russia has been estimated at < c.100,000 breeding pairs and < c.1,000 individuals on migration (Brazil 2009).

Trend Justification:  The global population trend is unknown (Wetlands International 2015) as is the European trend (BirdLife International 2015).
Current Population Trend:Stable
Additional data:
Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:This species is fully migratory. Many migrate inland, across the North American prairies, the Rockies and northern Andes, often staging at high altitude lakes. Adults depart on autumn migration early July, females slightly preceding males. Juveniles migrate later from the breeding grounds, from late July, in more leisurely fashion, and over a broader front. Northwards migration occurs largely along the same route. It is a vagrant to several European countries, especially Britain and Ireland, and also to Turkey, the Azores, Madeira, Canary and Cape Verde Islands. The species breeds on low mountain tops, river terraces and coastal barren areas and bluffs in high Arctic tundra; dry, high-lying lichen tundra and stony ridges. On migration and in winter the species occurs at inland wetlands to coastal habitats, including grassland, ditches, irrigated or rain-soaked fields, pools in desert, sand dunes; occasionally in upper littoral zone of estuaries, mudflats and beaches; usually on higher parts of the shore or dry fringes of wetland sites, often among vegetation. During the breeding season the diet consists mainly of insects, such as chironomid and cranefly larvae and adults, and beetles; also spiders. On migration, the species feeds on adult and larval beetles, larval Diptera. It is less gregarious than most other calidrines; in winter it can be found in flocks of 20–30 birds; some individuals defend feeding territory. Eggs are laid in June. Monogamous. Nest is relatively exposed; simple, shallow depression in bare ground, or amongst short vegetation, filled with bits of lichens or other vegetation (Van Gils et al. 2015).
Systems:Terrestrial; Freshwater; Marine
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):7.4
Movement patterns:Full Migrant
Congregatory:Congregatory (and dispersive)

Threats [top]

Major Threat(s): The species may be vulnerable to climate change, driving a mismatch between breeding and peak cranefly abundance (Green and Pearce-Higgins 2014).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
The following information refers to the species's European range only: The species is not listed on priority lists of the Conventions.

Conservation Actions Proposed
The following information refers to the species's European range only: No conservation measures are thought to be currently needed for this species.

Citation: BirdLife International. 2016. Calidris bairdii. The IUCN Red List of Threatened Species 2016: e.T22693404A86618825. . Downloaded on 23 September 2018.
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