BC Conservation Data Centre: Conservation Status Report
Gavia adamsii
Yellow-billed Loon
| Scientific Name: | Gavia adamsii |
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| English Name: | Yellow-billed Loon |
| Provincial Status Summary | |
| Status: | S2S3N |
| Date Status Assigned: | January 26, 2009 |
| Date Last Reviewed: | March 05, 2015 |
| Reasons: | Widespread although scattered in interior, low abundance but numbers are increasing, no known threats. |
| Range | |
| Range Extent: | FH = 20,000 to >2,500,000 square km |
| Range Extent Comments: | Found during all seasons along the outer and inner coasts and scattered throughout the interior (Campbell et al 1990). |
| Occurrences & Population | |
| Number of Occurrences: | C = 21 - 80 |
| Comments: | Found along inner and outer coasts and scattered throughout the interior (Campbell et al 1990). |
| Number of Occurrences with Good Viability / Ecological Integrity: | Rank Factor not assessed |
| Number of Occurrences Appropriately Protected & Managed: | U = Unknown |
| Population Size: | AC = 1 - 1,000 individuals |
| Comments: | Uncommon migrant; rare summer visitant and rare winter vistiant along the coast. Very rare in interior (Campbell et al 1990). |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | Rank Factor not assessed |
| Comments: | Oil spills. |
| Trend (in population, range, area occupied, and/or condition of occurrences) | |
| Short-Term Trend: | HI = Increase of >10% |
| Comments: | Nonbreeding range has been extending southward in W North America (especially in the last 2 decades). Prior to 1924, it was on the hypothetical list (Brooks and Swarth 1925) but is now seen in small numbers along the coast throughout the year (Campbell et al 1990). |
| Long-Term Trend: | Rank Factor not assessed |
| Other Factors | |
| Intrinsic Vulnerability: | Rank Factor not assessed |
| Environmental Specificity: | Rank Factor not assessed |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | Inventory throughout interior (except Southern Interior) and northern half of province to look for additional occurrences where it is assumed to be present as well. |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | Westereng, L.K. |
| Date: | January 20, 2000 |
| References | |
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Barr, J.F. 1997. COSEWIC Status report on the Yellow-billed Loon, Gavia adamsii. Committee on the Status of Endangered Wildlife in Canada. 44pp.
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Brooks, A. and H.S. Swarth. 1925. A distributional list of the birds of British Columbia. Pacific Coast Avifauna No.17, Berkeley, CA. 158pp.
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Campbell, R.W., N.K. Dawe, I.McT. Cowan, J.M. Cooper, G. Kaiser, and M.C.E. McNall. 1990. The Birds of British Columbia, Vol. 1. Nonpasserines: Introduction, Loons through Waterfowl. Royal B.C. Mus. in association with Environ. Can., Can. Wildl. Serv. 514pp.
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Please visit the website Conservation Status Ranks for information on how the CDC determines conservation status ranks. For global conservation status reports and ranks, please visit the NatureServe website http://www.natureserve.org/.
Suggested Citation:
B.C. Conservation Data Centre. 2000. Conservation Status Report: Gavia adamsii. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Apr 17, 2024).