Evergreen Spanworm Moth
 

Location: Calgary, AB
Date: Oct. 18, 2008

               
       Photo 3

Common Name:  Evergreen Spanworm Moth
                               Autumn Juniper Moth

Latin Name:  Thera juniperata Linnaeus, 1758
                        (R. Bercha, det.)

Wingspan:  17 - 22 mm

Range: Alberta

Habitat:  Various

Time of year seen: Late Sept. to October (Additional Sightings)

Caterpillar's Diet: Juniper

Other:  The Evergreen Spanworm Moth is originally a European species that was introduced to Canada in 1945.   It was first seen in the Halifax, Nova Scotia area and by 1963 it had spread as far west as Ottawa, Ontario.  Based on records from the E.H. Strickland Entomological Museum it is now present in British Columbia.  T. juniperata larva are solitary defoliators that feed exclusively on Juniper.  The moths have light brown forewings with a distinctive black apical streak and a dark band running across the middle while the hind wings are a pale buff color. The moth comes to light. (Forest Lepidoptera of Canada, Vol. 3)

 
         
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