Is there such a thing as a crosswalk or synonymy between common/popular field guides and the taxonomic nomenclature offered by the eButterfly species list?
I'm not a butterfly guy, but experimenting with trying to shovel some of my local observations into the eButterfly pile. In my first three entries I encountered two species (northwest ringlet, common branded skipper) that aren't listed for eastern OR, and what seem the most likely choices offered (common ringlet, western branded skipper) are either not described in my references and/or there's a mismatch of common & latin names.
It can be simple or grueling to come up with a name from field guides, but then you think you have some kind of handle. Except when the name you have is not an available choice (and seems not be be a rarity, but something to do with taxonomical opinions, choices, controversies, etc). There are practical ways around this obstacle in other disciplines, how about here?
Unfortunately, unlike birds, insect taxonomy isn’t as well coordinated. We, like most now, follow Pelham and his updates. This can be found at http://butterfliesofamerica.com/index.htm. For a few of your specific issues:
Northwest Ringlet is actually a subspecies of Common Ringlet (Coenonympha tullia).
Common Branded Skipper – I just added it to Oregon. It was only listed for Washington in our system.
I hope this helps!