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Species Details

Eurois occulta

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

Common NameGreat Gray Dart; Great Brocade SeasonalityJune 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 Name Eurois occulta Common 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. Notes Eurois 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/2-6387/9-415015. Accessed 22 May. 2025.

Specimen Information

There are 31 specimens of this Species.

31 results plotted on map in 11 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM18196 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Red Deer Collected ByWhitehouse, F. C. Date Collected1917-08-06

UASM18202 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1943-08-06

UASM18215 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Rock Lake Collected ByFuller, E. Date Collected1994-07-22/1994-07-23

UASM18228 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1929-08-10

UASM18231 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1917-08-18

UASM18232 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lethbridge Collected BySeamans, H. L. Date Collected1922-08-29

UASM18234 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Cooking Lake Date Collected1918-07-19

UASM18235 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-06-30

UASM18236 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1920-07-06

UASM18237 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1919-07-11

UASM18239 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-08

UASM18240 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1929-08-17

UASM18242 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByMackie, Donald Date Collected1918-07-14

UASM18243 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-19

UASM18244 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1953-08-11

UASM18245 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1917-08-11

UASM18246 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1916-07-16

UASM18250 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1919-07-14

UASM7264 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Tofield Collected BySchmidt, B. C. Date Collected1999-08-04

UASM24251 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dinosaur Provincial Park Collected ByAnweiler, G. G. Date Collected2002-09-05

UASM24252 - Eurois occulta

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dinosaur Provincial Park Collected ByAnweiler, G. G. Date Collected2002-09-05

Adult Seasonal Distribution