New York Natural Heritage Program
Frosted Elfin
Callophrys irus (Godart, [1824])

New York State Distribution [-]
The lupine (Lupinus perennis) feeding variety is very widely scattered on sandplains, mainly in the upper Hudson Valley, but also in Oneida and Genesee Counties and on Long Island. Indigo (Baptisia spp.) feeders occur in the lower Hudson Valley and on Long Island.

Global Distribution [-]
The species as a whole has a very fragmented distribution from southern Wisconsin across Michigan, northern Indiana, northern Ohio, southern Ontario and New York, to southern New England, including a small portion of Maine (gone by 1900). It was, perhaps, most widespread in the Great Lakes region and from southern New England down the coast and Piedmont into the Carolinas, and from there extended very spottily westward, but not reaching the Mississippi Valley. There is a disjunct subspecies in Texas and adjacent areas.