I have yet to find a field guide that does not describe the Little Yellow habitat as dry and sandy (Okay, I just found one, Butterflies of the Carolinas). Ditto that they are common in the Southeast. First of all, I do not always find them in dry sandy areas in Middle TN, plus they are not as common as Orange Sulphurs, Clouded Sulphurs, Sleepy Orange and Cloudless Sulphurs here. Is it the same in your area (East & West TN, Plateau)? I am curious to see if you see them abundantly/commonly and if you find them in dry, sandy areas.