Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

National Moth Week is July 20-28, 2024!

Moths are amazing creatures. Take photographs and share your moth sightings with us to document the moths where you live.

Regional Butterfly and Moth Information

Top 20 Commonly Reported Butterflies and Moths of Montana

These are the most commonly reported butterflies and moths in Montana. If you do not see the species you found, look at all photographs submitted in Montana, or visit the Montana page to see recently submitted sightings.


Mourning Cloak
Nymphalis antiopa

Milbert's Tortoiseshell
Aglais milberti

Purplish Copper
Lycaena helloides

Clouded Sulphur
Colias philodice

Melissa Blue (includes Karner Blue)
Plebejus melissa

Hoary Comma
Polygonia gracilis

Painted Lady
Vanessa cardui

Boisduval's Blue
Plebejus icarioides

Green Comma
Polygonia faunus

Satyr Comma
Polygonia satyrus

Two-tailed Swallowtail
Papilio multicaudata

Silvery Blue
Glaucopsyche lygdamus

Greenish Blue
Plebejus saepiolus

Cabbage White
Pieris rapae

Common Wood-Nymph
Cercyonis pegala

Northern Crescent
Phyciodes cocyta

Woodland Skipper
Ochlodes sylvanoides

Anise Swallowtail
Papilio zelicaon

Field Crescent
Phyciodes pulchella

Common Checkered-Skipper
Burnsius communis

We can help identify your butterfly or moth!

If you know the date and location where the photograph was taken, we can help. It's simple!

 Register for a free account

  Submit a Sighting

A coordinator will review your submission, and you will get an email with the identification.

We will store your submitted data. Your submission will contribute to our species profiles, checklists, and database. You can track all your submissions and create a personal species list.


Identifying Caterpillars

Do you have a photograph of a caterpillar? If so, when you submit your photograph, please provide us with host plant information if possible. Consider raising it to the adult stage before submitting photographs.

Surprisingly, most of the larval stages of butterflies and moths are simply unknown, and caterpillar photographs can be very difficult to identify. It may take some time for a coordinator to identify your caterpillar.

Browse all caterpillar images

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