Northwest Butterflies: September 2011

On Sunday, September 4th, I explored the mountains northeast of Ellensburg with my parents. We primarily traveled along Naneum Ridge Road, between Schnebly and Colockum canyons. I expected to see a few butterflies, but not as many as we did. I counted 12-13 species, including at least a hundred female coronis fritillaries, and a couple dozen pine whites.
Nectaring on thistle in many areas:
Ochlodes sylvanoides (woodland skipper) ~20
Hesperia juba (juba skipper) ~15-20
Colias sp. 1
Neophasia menapia (pine white) ~20 males searching pine trees, 1 female
nectaring on thistle
Aglais milberti (Milbert's tortoiseshell) 2
Speyeria coronis (Coronis fritillary) couple dozen females on thistle, at least
a hundred flying along the roads and over meadows, generally heading downhill.
Near the headwaters of Coleman Creek:
Lycaena helloides (purplish copper) 1 male
Plebejus idas (northern blue) 1 female
Polygonia faunus (green anglewing) 2
Aglais milberti 1
All going nuts on what I believe was Ericameria bloomeri, "rabbitbrush goldenweed":
Plebejus anna (Anna's blue) 5-8 males, 3 females
Plebejus icarioides (Boisduval's blue) 1 male
Satyrium semiluna (halfmoon hairstreak) 1
Cercyonis sthenele (great basin woodnymph) 5-10
Ochlodes sylvanoides (woodland skipper) 5

I plan to write more detailed blog posts in the coming days about some of these species. For now, here is a sample of my photos from the day.