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Warner Basin/Warner Lakes/Warner Potholes

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Grebe Survey Summary

  • Max Adults: 3000
  • Year: 1987
  • Most Recent Adults: 3000
  • Year: 1987
  • Survey Type: Boat
  • Most Common Threats Reported: N/A
Lake name:
Warner Basin/Warner Lakes/Warner Potholes
Location:
Oregon
Latitude:
42.459435
Longitude:
-119.837633
Basin type:
non-reservoir
Management agency:
U.S. Bureau of Land Management; Oregon Department of State Lands; private
Region associations:
Crump Lake; Hart Lake; Flagstaff Lake; Blue Joint Lake.
Designations:
Area of Critical Environmental Concern; Conservation Opportunity Area
Comments:
Warner Basin was once a giant deep lake. Water receded and left interconnected lakes such as Crump Lake, Anderson Lake, Hart Lake, Flagstaff Lake, and Blue Joint Lake. This is an important stopover site for migrating birds and is an Area of Critical Environmental Concern (ACEC) and a Conservation Opportunity Area (COA). The water is used for irrigation depending on year but if Hart Lake dries up, the rest of the valley is dry.

Surveys (3)

Survey Citation:
Ivey, G.L., and C.P. Herziger. 2006. Intermountain west waterbird conservation plan, version 1.2. A plan associated with the Waterbird Conservation for the Americas Initiative. Published by U.S. Fish and Wildlife Service Pacific Region, Portland, Oregon.

  • Time period
    N/A
  • Source
    Conservation Plan
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults 1 to 100 42 1987
Most Recent Adults 1 to 100 42 1987
Max Nests N/A N/A N/A
Most Recent Nests N/A N/A N/A
Max Chicks N/A N/A N/A
Most Recent Chicks N/A N/A N/A

Comments:

Appendix D, Table D-2, data is 21 pairs iin 1987, area population estimate is 42, population data source is Stern 1988.

Survey Citation:
Ivey, G. 2006. Atlases of waterbird nesting sites for California, Idaho, Oregon and Washington. Region 1 Non Game Program, U.S. Fish and Wildlife Service, Portland, Oregon.

  • Type
    boat
  • Time period
    26 May 1987
  • Source
    Database
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults >1000 3000 1987
Most Recent Adults >1000 3000 1987
Max Nests >1000 1500 1987
Most Recent Nests >1000 1500 1987
Max Chicks N/A N/A N/A
Most Recent Chicks N/A N/A N/A

Comments:

Observer rounded off estimate for numbers.

Survey Citation:
Gabrielson, I. N., Jewett, S. G., & Jewett, S. G. Stanley G. 1970. Birds of the Pacific Northwest; with special reference to Oregon. Dover Publications.

  • Time period
    N/A
  • Source
    Book (species account)
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults 101 to 500 several historical
Most Recent Adults 101 to 500 several historical
Max Nests 101 to 500 several historical
Most Recent Nests 101 to 500 several historical
Max Chicks N/A N/A N/A
Most Recent Chicks N/A N/A N/A

Comments:

Historical record (no year) of often "great" colonies on this lake.

Sources of Information

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