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

Your best odds for spotting a monarch in Alaska are in the southern panhandle and coastal areas like the Tongass National Forest, Ketchikan, and Juneau. They tend to show up in open gardens, meadows, and roadsides that have abundant nectar flowers, especially milkweed (though rare in Alaska) and other composite blooms. I have also heard reports from the Anchorage area during unusually warm summers, but those are less common.

Monarchs in Alaska are most likely to appear from late June through August, with the peak window in July. They arrive as vagrants after long-distance flights from the Lower 48, pushed north by warm, moist air currents. A string of days above 70°F with southern winds often precedes a sighting. Morning and early afternoon are the best times to search when butterflies are most active on flowers.

The monarch is unmistakable once you learn a few key marks. Look for a large orange and black butterfly with a wingspan of 3.5 to 4 inches. The upper side has thick black veins and a double row of white spots on the black wing borders. In Alaska, the main lookalike is the larva of the mourning cloak butterfly, but that species has a creamy yellow border on dark wings, not orange. The viceroy butterfly, a close mimic, does not occur in Alaska. Check the wing margins: monarchs have black borders with white dots, while viceroys have a black line crossing the hindwing.

See our state animal guide for the next step.

Adult monarchs feed on nectar from a variety of flowers. In Alaska, they seek out late-blooming plants like fireweed, asters, goldenrod, and dandelion. Milkweed, the only host plant for their caterpillars, is rare in Alaska and mostly found in the southernmost coastal gardens. If you want to attract them, plant a patch of common milkweed or showy milkweed near a sunny spot.

To increase your chances of a monarch visit, plant native nectar sources that bloom in mid to late summer. Fireweed is a top choice and grows well across the state. Also include asters, coneflowers, and butterfly bush (non-invasive varieties). Avoid pesticides and provide a shallow water dish with wet sand for puddling. A sunny, sheltered garden near the coast gives the best odds.