Common NameGreat Gray Dart; Great BrocadeSeasonalityJune through early September.IdentificationA rather large moth (5.5 - 6.5 cm. ws) with grey and black FW. The normal noctuid pattern is well marked, the lines doubled. The AM and PM lines are bordered in white, and the claviform and orbicular clearly marked with pale scales. Reniform large, but not contrasting strongly with the ground. Median and terminal areas darker. HW sooty gray-black, fringe white and contrasting sharply. Antennae simple. Sexes similar. Can be separated from Eurois nigra by the black HW with white fringe, and from Eurois astricta by the grey and black instead of brown FW.
Scientific NameEurois occultaCommon Name
Great Gray Dart; Great Brocade
Habitat
Woodlands and edges.
Seasonality
June through early September.
Identification
A rather large moth (5.5 - 6.5 cm. ws) with grey and black FW. The normal noctuid pattern is well marked, the lines doubled. The AM and PM lines are bordered in white, and the claviform and orbicular clearly marked…
A rather large moth (5.5 - 6.5 cm. ws) with grey and black FW. The normal noctuid pattern is well marked, the lines doubled. The AM and PM lines are bordered in white, and the claviform and orbicular clearly marked with pale scales. Reniform large, but not contrasting strongly with the ground. Median and terminal areas darker. HW sooty gray-black, fringe white and contrasting sharply. Antennae simple. Sexes similar. Can be separated from Eurois nigra by the black HW with white fringe, and from Eurois astricta by the grey and black instead of brown FW.
Conservation
Widespread and fairly common.
Diet Info
A variety of trees, shrubs and herbs. In North America Tamarack, Trembling aspen, alder and willow have been reported, with Tamarack listed as the major host (Prentice et al, 1962)! European records include alder,…
A variety of trees, shrubs and herbs. In North America Tamarack, Trembling aspen, alder and willow have been reported, with Tamarack listed as the major host (Prentice et al, 1962)! European records include alder, willow, Ribes, Rose, Lathyrus, Chamaenerion, Vaccinium myrtillus, V. uliginosum, and Thymus.
Range
Eurasia and temperate North America. In NA, from Lab and NJ west across southern Canada to the Pacific.
NotesEurois occulta comes to light and is often rather common at sugar bait. Some authors spell the specific name occultus.
Citation
Page Citation for Eurois occulta
Page Citation
"Species Details - Eurois occulta, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-6387. Accessed 17 Jun. 2024.
Specimen Information
There are 176 specimens of this Species.
176 results plotted on map in 74 markers. Note: Only records with latitude and longitude coordinates are plotted on map.