Scudder's Sulphur, Female Eclosure 2009 from larva that hibernated- Colias scudderii scudderii

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Female eclosing 11 May 2009
Female  eclosing  11 may 2009

female eclosing

Female inflating wings

female inflating wings

inflating wings

Female, right side with a dark marking

Female, left side with no dark marking
Female left side

Photo and other Details - ©Nicky Davis

Females located by Todd Stout on Murdock Mountain and also on July 27, 2008, Jack Harry, Les Davis and I located  females past mm 27 along the Mirror Lake Highway, Duchesne County, Utah.  Females were returned to the same location after we obtained these eggs.
N. 40.40.881, W. 110.55.165
Elevation 10,349 feet

Four  females oviposited 160 ova on an unknown Vaccinium  within a couple of days.  The eggs  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. 
  They were taken out of hibernation April 21, 2009 and were fed Brush Willow, Salix exigua because the road into the Uinta Mountains where the Salix planifolia grows is not open in April .  Most of them  were fine eating the exigua after the hibernation.

A pupa formed May 3, 2009 and female butterfly hatched after eight days.

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
Salix exigua

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