Subject: Dwarf Yellow Sulphur Butterfly
Location: 36 degrees 24’ 57.11”N; 88 degrees 12’ 21.94” W [Tennessee]
September 19, 2012 8:23 pm
I think my previous attempt to send to you did not work. If it did, guess you can delete one of the messages. I believe that the two pictures here are Dwarf Yellow Sulphur Butterflies. They are really small – probably less than an inch from body to wingtip. There were at least a dozen or more in our field late this afternoon (Sept. 19, 2012). We are in Buchanan, TN which is in the northeastern corner of west TN (Kentucky Lake is our county’s eastern border and Kentucky is our northern border). The butterflies did not seem to be looking for flowers – the two here were on blades of grass and some even lit on piles of dead grass left from haying last month. I did not see this butterfly on your site nor on Bug Guide, but based my ID on National Audubon Society Field Guide to Butterflies.
Signature: Mary Ann
Hi Mary Ann,
We could not find any evidence that you sent this submission twice. We are thrilled to get your lovely photos of a Dwarf Yellow Sulphur, Nathalis iole, which BugGuide calls the Dainty Yellow and elaborates: “Resident in Guatemala north to peninsular Florida and the Southwest. Cannot survive cold winters, therefore every summer re-colonizes through the Great Plains to southeast Washington, southeast Idaho, Wyoming, and Minnesota.” The habitat is listed as: “Open, dry places including coastal flats, weedy fields, grasslands, road edges, meadows, and hillsides” where it feeds on “Dogweed, marigold and other asters.” Known as North America’s smallest Sulphur, this is a new species for our website.