Trichiosoma triangulum

Kirby, 1837

Giant Birch Sawfly

A large in the , found in association with willow and birch . Females into leaves, and the are -like that feed on foliage. are active during summer months and are often observed on vegetation.

Trichiosoma triangulum by Matt Bowser, U.S. Fish and Wildlife Service. Used under a Public domain license.

Trichiosoma triangulum 23615874 by Alexandria 'Alex' Wenninger. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Trichiosoma triangulum: /ˌtrɪkiˈoʊsəmə traɪˈæŋɡjələm/

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Images

Habitat

Associated with willow (Salix) and birch (Betula) . Observed on willow branches where females seek leaves for .

Distribution

Canada: recorded from Alberta, British Columbia, Labrador, and Manitoba.

Seasonality

active in summer; observed in late June in Colorado at approximately 7,500 ft elevation.

Diet

feed on leaves of willow and birch.

Life Cycle

Females insert into leaves. are -like and feed on foliage. details not documented in available sources.

Behavior

Females observed seeking leaves on willow for . do not despite their large size and -like appearance.

Ecological Role

as ; contributes to leaf consumption in willow and birch .

Similar Taxa

Cimbex americanaLarger member of same (); males engage in aerial duels. Both are large, non-stinging with -like appearance.