Black Oystercatcher (Haematopus bachmani)
The Black Oystercatcher (Haematopus bachmani) has been identified as a focal species due to its low overall population numbers (8,900-11,000 globally), lack of information about important breeding, migratory and wintering sites, unknown population trends, and a growing number of threats to oystercatchers themselves and the habitats on which they rely.
Major threats include coastal development and increased human disturbance in the southern part of its range (Washington to Baja California), and nest overwash by boat wakes, human disturbance, and shoreline contamination (oil spills) in the northern part of its range (Alaska and British Columbia). Other factors contributing to low population numbers include low reproductive success, possible adult mortality due to predation by introduced predators, and global climate change with all its resultant effects on habitat and resources.
Tessler, D.F., J.A. Johnson, B.A. Andres, S. Thomas, and R.B. Lanctot. 2007. Black Oystercatcher (Haematopus bachmani) Conservation Action Plan. International Black Oystercatcher Working Group, Alaska Department of Fish and Game, Anchorage, Alaska, U.S. Fish and Wildlife Service, Anchorage, Alaska, and Manomet Center for Conservation Sciences, Manomet, Massachusetts. 115 pp.