Entomology Collection TitleImage Bugs Pinned
Species Page - Acronicta quadrata
Acronicta quadrata ->species page

E-mail this Page   
Print this Page   
Link to this Page   

scientific name    Acronicta quadrata    

common name     Quadrate Dagger Moth

Dry shrubby woodland clearings and edges and cherry shrublands.

Adults have been collected in Alberta from mid-June through mid-July.

A medium-size moth (3.0-4.0 cm wingspan) with grey forewings and white hindwings. Forewings are a clear even bluish-grey. Basal and antemedian lines are doubled and incomplete, and the postmedian line is a thin, dark complete line. There is a thick, black basal dash and a short thick dash in the anal angle. The area between the orbicular and reniform spots is also filled with black scales in an X or square shape, hence the name. Overall appearance is clean and rather elegant. Hindwings are shining white, with some darkening along the margin. The antennae are simple, and the sexes are similar, except the female is somewhat darker, especially on the hindwings. See also Acronicta radcliffei, A. grisea, A. interrupta and A. furcifera, all of which are either darker grey or with more extensive dark patterning.

life history
Adults are nocturnal and come to both lights and sugar bait. The larvae are solitary defoliators of deciduous shrubs. They overwinter as pupae.

An uncommon moth, but no obvious concerns.

diet info
No Alberta data; elsewhere in Canada recorded larval hosts include Pin cherry (Prunus pennsylvanica), Chokecherry (Prunus virginiana), plum (Prunus sp.), Saskatoon (Amelanchier sp.), Trembling aspen (Populus tremuloides) and willow (Salix). The principal host appears to be species of wild cherries (Prunus).

In Canada, it occurs sparingly across the wooded area north to the southern edge of the Boreal forest. From western Quebec, west to the Rocky mountains in Alberta and north western British Columbia. In Alberta, it has been collected from Calgary, north along the Red Deer River to the Redwater dunes in the southern boreal forest, just northeast of Edmonton. It has also been collected in the Peace River district of British Columbia, just west of the Alberta border. Widespread in the western USA.

quick link

Comments (0)Add New Comment

Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.

Add New Comment (all fields are required)

Related Species Info
Display Hierarchy
References (2)
Specimen Info
There are 13 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (13)
Related Links
Moth Photographers Group


Logo Department of Museums and Collections ServicesLogo University of Alberta