eastern comma butterfly on decaying oak leaves - polygonia comma

eastern comma butterfly decaying oak leaves polygonia north american family nymphalidae subfamily nymphalinae seasonally variable upperside summer form 39aph39 hindwings black winter forms reddish orange underside striped dark light brown silvery mark middle hindwing may spotted woods rivers ponds marshes swamps water sources seldom visits flowers feeds sap rotting fruit salts minerals puddling dung