Justification of Red List category
This species has a very 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 increasing, 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 may be small, but it is not believed to 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.
Estimate excludes totals for Haematopus chathamsensis, which is not split by Wetlands International (2006).
The population is suspected to be increasing following increased protection (del Hoyo et al. 1996).
Text account compilers
Butchart, S., Ekstrom, J.
BirdLife International (2023) Species factsheet: Haematopus unicolor. Downloaded from http://datazone.birdlife.org/species/factsheet/variable-oystercatcher-haematopus-unicolor on 29/11/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 29/11/2023.