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Black-necked Stilt Himantopus mexicanus

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 appears to be stable, and hence the species does not 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.

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
SACC. 2006. A classification of the bird species of South America. Available at:
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Taxonomic note

Himantopus himantopus (del Hoyo et al. 2013) was previously split as H. himantopus, H. leucocephalus, H. mexicanus and H. melanurus following Sibley and Monroe (1990, 1993), contra Christidis and Boles (1994) and Turbott (1990) who included leucocephalus as a subpecies of H. himantopus, but H. melanurus was subsequently lumped with H. mexicanus following AOU (1998) and SACC (2006).

Population justification
Estimate includes totals for 'Himantopus melanurus'.

Trend justification
The overall population trend is stable (Wetlands International 2006). This species has undergone a small or statistically insignificant increase over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007) Note, however, that these surveys cover less than 50% of the species's range in North America.

Text account compilers
Ekstrom, J., Butchart, S.

Recommended citation
BirdLife International (2014) Species factsheet: Himantopus mexicanus. Downloaded from on 13/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from on 13/07/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

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To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Black-necked stilt (Himantopus mexicanus) 0

Key facts
Current IUCN Red List category Least Concern
Family Recurvirostridae (Stilts and avocets)
Species name author (Müller, 1776)
Population size 200000-2000000 mature individuals
Population trend Stable
Distribution size (breeding/resident) 9,530,000 km2
Country endemic? No
Links to further information
- Additional Information on this species