Eucopina siskiyouana

Distinguished from other Eucopina species by genitalia morphology; external features alone are insufficient for reliable identification. Forewing patterns are generally mottled gray-brown with variable markings typical of the genus. Specimens require dissection or molecular analysis for definitive identification.

Coniferous forests, particularly those containing fir (Abies) species. Associated with mature to old-growth forest stands where host trees produce cones.

Western North America; recorded from the Siskiyou Mountains region of California and Oregon, with range extending through suitable coniferous forest habitats in the Pacific Northwest and montane western United States.

Adults have been recorded from June to August based on collection data. Larval activity within cones likely occurs during cone development in spring and early summer.

Larvae feed within developing cones of fir trees (Abies spp.), consuming seeds and cone tissues.

• Abies - hostFir species; larvae bore into and feed within developing cones

Larvae develop within fir cones, feeding on seeds and internal tissues. Pupation occurs within the cone or in surrounding debris. Adults emerge in summer. Specific details on voltinism and overwintering stage are not documented.

As a seed predator, larvae reduce fir seed production in affected cones. Population impacts on forest regeneration are generally localized and minor.

Minor forestry concern; cone damage reduces seed collection for reforestation efforts in some areas. Not considered a significant economic pest.

• Eucopina tocullionanaSimilar size, coloration, and cone-boring habit; requires genitalia examination for separation
• Eucopina bobanaOverlapping western North American range and fir association; distinguished by male genitalia morphology

• Tortricidae
• Olethreutinae
• Eucosmini
• conifer pest
• seed predator
• western North America
• fir associate

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life