Callippe Fritillary   S. callippe

From May to August, Clemence’s Fritillary shares high-elevation meadows with adult Callippe Fritillary Speyeria callippe and Coronis Fritillary Speyeria coronis (photo left).  The three species compete for nectar, particularly at native thistle (Cirsium sp.), and males patrol the same meadows. 
Male callippe hilltop with clemencei on the Chew’s Ridge summit and along adjacent ridges.  It is unclear whether larvae of these species utilize the same Viola host plant. 


Correct identification to species is vital to survey work.  While perched or nectaring, clemencei, with its unsilvered underside, is easily differentiated from the other species.  In flight, however, correct ID can be a challenge.  The rich reddish-orange of the male clemencei is generally diagnostic from both the larger coronis and the similar-sized callippe.    The female clemencei  is much paler than the darkly checkered callippe, but separation from coronis can be confounding (see below).  On average, coronis is darker and more strongly marked, while clemencei appears buffier and paler.

 

Coronis Fritillary   S. coronis

Clemence’s Fritillary   S. a. clemencei