Swallowtail butterflies (Papilio spp.)

Photo by Public domain (iNaturalist) on iNaturalist · CC0 (public domain) · specimen identified as Papilio canadensis

PollinatorActive now (September)

Swallowtail butterflies

Papilio spp.

When
May–Sep — May, June, July, August, September. Earlier in the south, later in the north.
Where to look
Carrot-family plants — dill, parsley, fennel, Queen Anne's lace — and wet gravel where males gather.
How to know it
Large, with tails on the hindwings; black-and-yellow tiger stripes, or black with blue and orange spots.
What it does for you
If you find fat green caterpillars with black bands on your dill, leave them. Plant enough dill for both of you.

Found in these regions

Is it active near you?

Get this week's guide for your area

Enter a town, postal code or ZIP and we'll tell you what's happening right there this week — from your local climate, this week's weather and your ecological region.

Also active in September