Abundant in southernmost Texas, where these photos were taken, Large Orange Sulphur is accidental in North Carolina, with one sight report of one in flight from Dare Co. on 10/2/2005 (Harry LeGrand, Will Cook). They're very similar to the related Cloudless Sulphur (Phoebis sennae), but are a rich golden-orange above. In North Carolina, a large Orange Sulphur (Colias eurytheme) in flight could cause confusion - but note the complete lack of any black on the Large Orange Sulphur.

Male, Santa Ana NWR, Hidalgo Co., TX 10/15/04.