specimen of woodland grayling butterfly

animal antennae antipredator backside bark beauty butterfly camouflage caterpillar closed closeup colors daylight defence drawings entomologist entomology environment environmental europe eyespots fagi flight fly grayling hipparchia insect italy large larva macro mechanisms metamorphosis morning moth natural nature nymphalidae outdoor pupa season seasonal side summer sunlight sunny terni trunks umbria ventral wild wildlife wings woodland zoology