05 November 2009

Butterfly (and dandelion) in November

NovemberSulfur

This is the best shot of this butterfly I saw yesterday. Today at the same spot, there were 2 of them frolicking, but they disappeared before I could approach them.

It is one of the sulphurs, either the clouded sulphur (Colias philodice) or the orange sulphur (C. eurytheme). I don't know how to tell them apart.

1 comment:

Wallace Ward said...

You really need to see the upper wing surface; Clouded is yellow there, while the Orange is, well, orange. Brock advises in the Kaufman Field Guide to Butterflies of North America that the two species can hybridize. Makes you want to hurry that bar-code device for distinguishing species into mass production.