The micropyle is the large depression at the top of a butterfly's egg. This small pit marks where the sperm entered the egg. While the egg is developing, air and water enter the egg through the micropyle. Many butterflies migrate in order to avoid cold weather. Butterfly migration is not well understood.
Adults drink flower nectar.
This butterfly has suffered population decreases due to loss of habitat. It was named by Clench in 1941. It lives in North America from southern Alaska down to Mexico. As larva, they eat the milkweed plant . A million is a thousand thousand.