Gabriola dyari (Taylor)

 - Dorsal view of mature larva
  • Latin name: Gabriola dyari (Taylor)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae


British Columbia



Damage, symptoms and biology

Gabriola dyari is a common innocuous solitary defoliator.

Mature larva to 20 mm long. Head, light tan with reddish brown mottling, vertex moderately cleft. Body, stocky with numerous swellings, rusty brown with white dorsal patches on the second, fourth and eighth abdominal segments

This species appears to overwinter in the egg stage. Larvae are present from May to July, pupation occurs June to August, and adults emerge from July to August.

Life cycle (West of the Rockies)

Life cycle (West of the Rockies)
Stage/Month J F M A M J J A S O N D

Canadian Forest Service Publications

Diet and feeding behaviour

  • Phyllophagous : Feeds on the leaves of plants.
    • Free-living defoliator: Feeds on and moves about freely on foliage.
Information on host(s)

Main host(s)

Amabilis fir, Engelmann spruce, grand fir, mountain hemlock, Rocky Mountain Douglas-fir, subalpine fir, western hemlock, western redcedar

  • Dorsal view of mature larva
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