butterfly on ambrosia

alfalfa allergenic allergy ambrosia american animal antenna artemisia artemisiifolia background bears bitterweed blackweed blue body botany bright butterfly closeup color detail disease europe european fauna fever flower flowers flying green harmony head illustration ilness inachis insect large leaf lepidoptera lycaenidae macro meadow nature nymphalidae open plants pollen profile ragweed rare season sickness species spots spread stammerwort stem stickweed striped summer tassel view vivid weed white wildlife wing wings woolly wormwood yellow