|scientific name Amphipyra glabella |
common name Grey Amphipyra
Dry deciduous woodland
Adults are on the wing in Alberta from early-mid August through early September.
A medium-size (3.3-4.0 cm wingspan) light ash or buff-grey moth. The forewing is powdery grey, with the antemedian line, orbicular spot and reniform spots all reduced to a few dark dots. The postmedian line is better marked, and consists of a sinuous line of dark spots. The subterminal line is a straight line of dark grey dots at the veins, and forms the boundary between the grey forewing and the contrasting pale grey or buff terminal area. The hindwings are light grey, darkening toward the margin. The antennae are simple, and the sexes are alike. The sharply contrasting pale terminal area
on the grey forewings will separate glabella from other the moths found in southern Alberta in late summer and fall.
There is a single annual brood, with adults emerging in late summer. The probable overwintering stage is the egg. Adults come readily to both sugar bait and to light.
A locally common, widespread species; no concerns.
No Alberta data; elsewhere in Canada reported from Balsam poplar (Populus balsamifera) and Douglas fir (Pseudotsuga taxifolia) (one record for each; Prentice, 1962).
New York and Quebec west to southern BC, south to Georgia and Colorado. In Alberta, apparently confined to wooded areas along the river valleys on the plains, north at least to the Red Deer River at Tolman Bridge.
Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.