BC Conservation Data Centre: Conservation Status Report
Papilio machaon oregonius
Old World Swallowtail, oregonius subspecies
| Scientific Name: | Papilio machaon oregonius |
|---|---|
| English Name: | Old World Swallowtail, oregonius subspecies |
| Provincial Status Summary | |
| Status: | S4 |
| Date Status Assigned: | January 01, 2008 |
| Date Last Reviewed: | March 31, 2021 |
| Reasons: | |
| Range | |
| Range Extent: | F = 20,000-200,000 square km |
| Range Extent Comments: | This species is throughout the central interior, from the US border and up the southern Okanagan into the upper Fraser Canyon. Range extent approximately 50,000 km2 (J. Heron, pers. comm. 2012). |
| Area of Occupancy (km2): | U = Unknown |
| Occurrences & Population | |
| Number of Occurrences: | D = 81 - 300 |
| Comments: | There are about 65 dots in Guppy and Shepard, and a number of more occurrences from Guppy's database. So estimate 80 - 300 occurrences (J. Heron, pers. comm. 2012) |
| Number of Occurrences with Good Viability / Ecological Integrity: | U = Unknown |
| Number of Occurrences Appropriately Protected & Managed: | Rank Factor not assessed |
| Population Size: | U = Unknown |
| Threats (to population, occurrences, or area affected) | |
| Degree of Threat: | U = Unknown |
| Comments: | The species inhabits dry sagebrush areas of the southern interior and Chilcotin, north to Soda Creek. Although this habitat is abundant, there are threats from grazing and natural forest succession. In the southern parts of its range there is likely urban/commercial/agricultural development, but in the northern parts of its range (e.g., Chilcotin) there is less of a threat of habitat conversion, more of a threat from rangeland practises (J. Heron. pers. comm. 2012). |
| 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: | Marks, D. |
| Date: | March 15, 2021 |
| References | |
| No references available | |
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. 2021. Conservation Status Report: Papilio machaon oregonius. B.C. Minist. of Environment. Available: https://a100.gov.bc.ca/pub/eswp/ (accessed Jun 11, 2026).