BC Conservation Data Centre: Conservation Status Report
Ophiogomphus occidentis
Sinuous Snaketail
| Scientific Name: | Ophiogomphus occidentis |
|---|---|
| English Name: | Sinuous Snaketail |
| Provincial Status Summary | |
| Status: | S3 |
| Date Status Assigned: | April 29, 2015 |
| Date Last Reviewed: | March 15, 2023 |
| Reasons: |
The range is restricted to the southern portion (south of 51deg) of the province to fairly specific habitats with threats given the high populations in the areas where it occurs and from floods or droughts, sedimentation from logging or road building or the damming of waterways. It is not found in abundance where found. |
| Range | |
| Range Extent: | F = 20,000-200,000 square km |
| Range Extent Estimate (km2): | 77,871 |
| Range Extent Comments: | This species is found at low elevation sunny stream banks and sandy lakeshores from the east side of Vancouver Island, Lillooet, Cultus Lake area, Okanagan Valley north to the Shuswap and scattered in the west Kootenays for an estimated range extent of 77,871 km2. |
| Occurrences & Population | |
| Number of Occurrences: | C = 21 - 80 |
| Comments: | There are approximately 60 known locations. |
| Number of Occurrences with Good Viability / Ecological Integrity: | Rank Factor not assessed |
| Number of Occurrences Appropriately Protected & Managed: | C = 4 - 12 |
| Comments: | South Okanagan, Lac du Bois and Adams River are three provincially protected areas. |
| Population Size: | U = Unknown |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | U = Unknown |
| Comments: | This species is found in low elevation sandy streams and lake shores where there are threats from beach and riverside developments and recreational activity. Logging, damming, flooding or drought are also all potential threats. |
| Trend (in population, range, area occupied, and/or condition of occurrences) | |
| Short-Term Trend: | U = Unknown |
| Long-Term Trend: | U = Unknown |
| Other Factors | |
| Intrinsic Vulnerability: | Rank Factor not assessed |
| Environmental Specificity: | Rank Factor not assessed |
| Other Rank Considerations: | |
| Information Gaps | |
| Research Needs: | |
| Inventory Needs: | |
| Stewardship | |
| Protection: | |
| Management: | |
| Version | |
| Author: | Ramsay, L. (2023); Cannings, R.A. and L. Ramsay (2015) |
| Date: | March 04, 2023 |
| References | |
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Cannings, R.A. 2002b. Introducing the dragonflies of British Columbia and the Yukon. Royal B.C. Mus., Victoria, BC. 96pp.
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GBIF.org. 2023m. GBIF Occurrence Download for Ophiogomphus occidentis. https://doi.org/10.15468/dl.2h4hqr Accessed February 2023
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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. 2023. Conservation Status Report: Ophiogomphus occidentis. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 17, 2026).