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Species Page - Phragmatobia assimilans
Phragmatobia assimilans ->species page

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scientific name    Phragmatobia assimilans    

common name     Large Ruby Tiger

Moist, open habitats in deciduous and mixed forest.

Peak flight activity is from mid May to early June, with records ranging from Apr. 14 to Jun. 9.

Largest and most common member of this genus. Forewing pattern quite variable, but the wings are always opaque, not translucent like P. lineata and P. fuliginosa. Females tend to be larger and darker, with the forewing pattern better developed.

life history
There are a few specimens in the Bowman collection with dates in August. These may represent a rare second brood, reared material, or may be mislabeled. There have been no recent recordings for late summer flight dates in Alberta.

diet info
Probably various herbaceous plants; has been reared on dandelion and plantain (Gibson, 1911). Also occasionally feeds on white birch (McGugan, 1958), raspberry (Rubus), and balsam poplar (Populus balsamifera) (Northern Forestry Centre, Edmonton, AB).

A boreal forest and transition zone (parkland) species, found from Nova Scotia south to New England, west to British Columbia. Not known further south than Montana and the Black Hills of South Dakota (Donahue, 1993).

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Comments (2)Add New Comment

Romana Prokopiw (2011-09-24)
why no size dimensions? how confusing!

Felix Sperling (2011-09-25)
There is actually a 1 cm scale bar above the image of the moth. Were you looking for something in the text of the species page? We don''t have stats for average sizes, though this specimen was chosen to because it seemed fairly typical of the species.

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

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References (3)
Specimen Info
There are 177 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (177)
Related Links
Moth Photographers Group


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