Comprehensive Description

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General Description

A medium-size (3.4-3.6 cm wingspan) broad-winged powdery grey or grey-brown moth. The FW varies considerably, from a pale grey with dark brown-black basal, median and sub-terminal banding, to being more or less uniformly suffused with dark sooty brown scales. The ST line often has a dark red-brown outer edging, and there is a contrasting pale yellowish or buff lunule on the outer edge of the reniform in both forms. The HW is a dark yellow-brown, paler than the FW, crossed by a faint doubled basal band, a straight median line and a fine scalloped terminal line. The HW patterning is unusual in noctuid moths other than the genus Zale, and resembles certain Geometrids, such as Pero sp.. This little Zale is quite variable in appearance, but differs from other Alberta Zale in its sooty grey or light grey coloration (rich browns in the others). Alberta Z. duplicata belong to ssp. largera, which are larger and paler with more grey than black scaling than in the nominate subspecies.


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© University of Alberta Museums

Source: University of Alberta Museums

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