Population information

Order name Charadriiformes
Family name Haematopodidae
Scientific name Haematopus unicolor Common name Variable Oystercatcher
Population name New Zealand
Breeding range Coastal New Zealand Non-breeding range
Red List Category Least Concern
Ramsar regions Oceania
Notes

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 4,000 4,000 [R560]
WPE 4 0 0 4,000 4,000 [R560]
WPE 1 1993 1993 1 10,000 [R501]
WPE 2 1993 1993 1 10,000 [R501]
WPE 5 2011 2011 4,500 4,500 Census based [S6837] [R1154]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 0 0 Unknown
WPE 4 0 0 Unknown
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 2002 2011 INC Poor [T4318] [R1154]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 40
WPE 4 2006 40
WPE 1 0 -1
WPE 2 0 -1
WPE 5 2012 45

References

  • R560 - Sagar, P.M., Shankar, UDE, Brown, S. 1999. Distribution and numbers of waders in New Zealand, 1983-1994. in Robertson H. A. (ed). Wader Studies in New Zealand. Notornis Vol.46 Part 1
  • R501 - Ornithological Society of New Zealand. (pers. comm.). 1993. Unpublished data compiled for IWRB.
  • R1154 - Riegen, A. In litt. 4 April 2012 (shorebird expert, New Zealand).

Notes

  • S6837 - Estimate based on winter census work but species is difficult to count comprehensively due to occurrence at low densities.
  • T4318 - Apparently increasing, benefiting from site management work for shorebirds.



Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on