Monarch Butterflies in Maryland: identification guide and best places to start

Coastal areas and open habitats offer the best sightings. Start with Blackwater National Wildlife Refuge on the Eastern Shore, where marsh edges and wildflower meadows attract monarchs during migration. Also try the Chesapeake Bay Environmental Center and the trails at Point Lookout State Park. In western Maryland, the Appalachian Trail corridors and meadows around Green Ridge State Forest see consistent fall monarch movement.

Monarchs are most visible during two windows: the spring migration north from April to early June, and the fall migration south from late August to October. The peak fall migration in Maryland typically occurs in mid to late September, especially after a cold front with northwest winds. Warm sunny days with light wind bring them out of roosts and into open fields. Summer breeding monarchs can be seen from June through August, but numbers are lower than during migration.

Monarchs have bright orange wings with black veins and a thick black border dotted with white spots. The viceroy butterfly is the most common mimic: it is smaller, has a black horizontal line crossing the hindwing, and flies with a shorter gliding pattern. On the underside, monarch wings are grayish brown with faint orange patches, while viceroys have a more uniform brown color. For more identification details, check our monarch butterfly guide.

See our state animal guide for the next step.

Monarchs need milkweed for egg laying and caterpillar food, plus nectar plants for adult energy. In Maryland, common milkweed, swamp milkweed, and butterfly weed are key host plants. They also rely on late summer bloomers like goldenrod, asters, and ironweed in meadows, roadsides, and gardens. Disturbed fields and powerline cuts often hold the best milkweed patches. Preserved areas like the Maryland Environmental Trust's conserved lands are good targets.

Maryland sits along the Atlantic flyway, a major monarch migration corridor. In spring, monarchs move north from the Gulf Coast into Maryland, with some continuing to New England. Fall migrants funnel south along the Chesapeake Bay and the Atlantic coast, often using barrier islands and coastal barrier beaches as stopovers. The Eastern Shore's Delmarva Peninsula acts as a natural funnel, concentrating monarchs before they cross the Chesapeake Bay or continue down the coast.