Population information

Order name Charadriiformes
Family name Haematopodidae
Scientific name Haematopus ater Common name Blackish Oystercatcher
Population name bachmani, Pacific N America
Breeding range Pacific coast Aleutian Is to central west coast of Baja California Non-breeding range Mostly S British Colombia to Baja California
Red List Category Least Concern
Ramsar regions North America
Notes Previously considered a distinct species.

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 2 0 0 10,000 10,000 [R471]
WPE 3 0 0 6,900 10,800 [R11]
WPE 4 0 0 8,900 11,000 [R95]
WPE 1 0 0 -1 -1
WPE 5 2012 2012 10,000 10,000 Census based [R1007]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 2 1983 1993 STA [R471]
WPE 3 1983 1993 STA [R471]
WPE 4 1994 2004 STA [R473]
WPE 1 0 0 Unknown
WPE 5 2003 2012 STA Good [R1007]

Population 1% level

Publication Yearset 1 percent Note
WPE 2 1997 100
WPE 3 2002 90
WPE 4 2006 100
WPE 1 0 -1
WPE 5 2012 100

References

  • R471 - Morrison, R.I.G., Bourget, A., Butler, R., Dickson, H.L., Gratto-Trevor, C., Hicklin, P., Hyslop, C. and Ross, R.K. 1994. A preliminary assessment of the status of shorebird populations in Canada. Can. Wildl. Serv. Progress Notes No. 28. March 1994. 19pp.
  • R11 - Andres, B.A. and Falxa, G.A. 1995. Black Oystercatcher (Haematopus bachmani). The Birds of North America No.155 (A. Poole and F. Gill, eds). Academy of Natural Sciences, Philadelphia, Pennsylvania, and American Ornithologists? Union, Washington, D.C.
  • R95 - Brown, S., C. Hickey, and B. Harrington, eds. 2000. The U.S. Shorebird Conservation Plan. Manomet Center for Conservation Sciences, Manomet, MA.
  • R473 - Morrison, R.I.G., McCaffery, B.J., Skagen, S., Andres, B., Page, G., Jones, S., and Gill, R.E. 2005. Population estimates of North American shorebirds, 2005. Draft MS.
  • R1007 - Andres, B.A., Smith, P.A., Gratto-Trevor, C.L. & Morrison, R.I.G. 2012. Population estimates of North American shorebirds. In prep. [Temporary reference; final title to be confirmed.]

Notes




Copyright Wetlands International 2012

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