and other Details - ©Nicky Davis
Two females located by Todd Stout on Murdock Mountain. On July 27, 2008, Jack Harry, Les Davis and I located two females past mm 27 along the Mirror Lake Highway, Duchesne County, Utah. All females were returned to the same area after we obtained these eggs.
N. 40.40.881, W. 110.55.165
Elevation 10,349 feet
These females oviposited 160 ova on an unknown Vaccinium within a couple of days. They hatched after four days.
We put the larvae on Salix exigua (Brush Willow) which they refused to feed on, and all but 50 died. We moved the surviving 50 larvae to Diamondleaf Willow, Salix planifolia which was growing at the same location in which the females were flying. The larvae fed on that plant just fine. I kept them under light 24x7, nevertheless they all hibernated except one.
A pupa formed August 27, 2008 and a female butterfly hatched after six days.
Female eclosed 2 September 2008
Female eclosed 2 June 2009
The females oviposited on an unknown vaccinium and the larvae fed on D. Willow - Salix planifolia. After hibernation, they fed on Salix exigua. For photos of the host plant used, click on
Diamondleaf Willow, Salix planifolia
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