Monarch Butterfly
Orange wings with heavy black veins identify a migrant whose caterpillars can eat only milkweeds and whose journey outlasts any one summer adult.
Artwork inspired by Pauline Palmer
Eastern monarchs move north through several generations, then a long-lived late-summer generation flies toward high-elevation forests in central Mexico. Western monarchs use a more fluid network of coastal California and Mexican sites. In both systems, weather, nectar, milkweed, drought, and habitat continuity shape success.
A monarch is not every orange butterfly. Viceroys usually show a black line across the hindwing; queens are darker with white-spotted wings. Plant locally appropriate native milkweeds without pesticides, add fall nectar, and avoid moving caterpillars or captive-reared butterflies across regions where disease and genetics can travel with them.
- Caterpillar food
- Milkweeds only
- Migration
- Completed across multiple generations
- Illinois link
- Official state insect
Quick guide
- Check the veins
- Monarchs show bold black venation on orange wings.
- Look under leaves
- Eggs and striped caterpillars belong on milkweed.
Recognize and observe
- Check the veins
- Monarchs show bold black venation on orange wings.
- Look under leaves
- Eggs and striped caterpillars belong on milkweed.
- Plant for the whole cycle
- Pair native milkweed with season-long nectar.
- Keep migration wild
- Observe and conserve rather than transporting butterflies.
Good to know
Tropical milkweed can disrupt migration and disease dynamics where it persists year-round. Native regional species are the safer garden choice.
Notice these
- Milkweeds only
- Completed across multiple generations
- Official state insect