For instance , at Fort McCoy in west - central Wisconsin , all the nectar species listed for Karner blue butterflies require either full or partial sun .
As discussed in Canopy cover , nectar species increase in open habitats .
At Fort McCoy in west - central Wisconsin , all the nectar species listed for Karner blue butterflies require either full or partial sun .
As discussed in Canopy cover , nectar species increase in open habitats .