Monarch butterfly (Danaus plexippus)

Photo by Christine Young on iNaturalist · CC BY 4.0

PollinatorActive now (September)

Monarch butterfly

Danaus plexippus

When
May–Oct — May, June, July, August, September, October. Earlier in the south, later in the north.
Where to look
Milkweed for the caterpillars; any nectar — especially late asters and goldenrod — for the migrating adults.
How to know it
Orange with heavy black veins and a white-spotted black border. The caterpillar is banded yellow, white and black.
What it does for you
Eastern monarchs fly to central Mexico each autumn, several generations removed from the ones that left. Milkweed is the only plant their caterpillars eat.

Found in these regions

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Also active in September