It happens to every nature enthusiast at least once. You spot an orange butterfly with black markings hovering around a pretty flower and say, “Oh, look, it’s a monarch!” Except, on closer inspection, ...

Monarch butterflies (Danaus plexippus) rely on milkweed plants in the genus Asclepias, which provide egg-laying sites, food, and toxic compounds that help to protect caterpillars and adult butterflies ...