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Insects & Arthropods of Montana

The insects & arthropods most often spotted in Montana, ranked by recent research-grade observations.

27,370
recent observations
50
species listed
50
insects & arthropods

Naturalists have logged 27,370 research-grade observations across the 50 most-recorded species in Montana. The most frequently seen is the California Tortoiseshell, with 1,075 recorded sightings.

Most-observed insects & arthropods in Montana

California Tortoiseshell
Nymphalis californica
1,075 observations
Vancouver Bumble Bee
Bombus vancouverensis
947 observations · iNaturalist
White-spotted Sawyer
Monochamus scutellatus
924 observations
Spotted Tussock Moth
Lophocampa maculata
895 observations
Mormon Fritillary
Argynnis mormonia
805 observations · iNaturalist
Western Honey Bee
Apis mellifera
787 observations
Hunt's Bumble Bee
Bombus huntii
758 observations · iNaturalist
Western Tent Caterpillar Moth
Malacosoma californica
732 observations · iNaturalist
Western Conifer Seed Bug
Leptoglossus occidentalis
720 observations · iNaturalist
Mourning Cloak
Nymphalis antiopa
714 observations
Essex Skipper
Thymelicus lineola
709 observations · iNaturalist
European Mantis
Mantis religiosa
693 observations
Police Car Moth
Gnophaela vermiculata
681 observations · iNaturalist
Lorquin's Admiral
Limenitis lorquini
668 observations
Leafy Spurge Hawkmoth
Hyles euphorbiae
656 observations · iNaturalist
Painted Lady
Vanessa cardui
610 observations
Milbert's Tortoiseshell
Aglais milberti
608 observations · iNaturalist
Two-striped Grasshopper
Melanoplus bivittatus
598 observations · iNaturalist
Boisduval's Blue
Icaricia icarioides
593 observations · iNaturalist
Green Comma
Polygonia faunus
576 observations
Rocky Mountain Parnassian
Parnassius smintheus
564 observations · iNaturalist
Common Wood-Nymph
Cercyonis pegala
553 observations
Seven-spotted Lady Beetle
Coccinella septempunctata
530 observations
Small Wood-Nymph
Cercyonis oetus
514 observations · iNaturalist
Goldenrod Crab Spider
Misumena vatia
504 observations
Ornate Checkered Beetle
Trichodes ornatus
475 observations
Field Crescent
Phyciodes pulchella
465 observations · iNaturalist
Common Alpine
Erebia epipsodea
462 observations · iNaturalist
Banded Garden Spider
Argiope trifasciata
453 observations · iNaturalist
Asian Lady Beetle
Harmonia axyridis
428 observations
Anise Swallowtail
Papilio zelicaon
426 observations
Mormon Cricket
Anabrus simplex
420 observations
Common Drone Fly
Eristalis tenax
417 observations
Common Ringlet
Coenonympha california
410 observations
Small White
Pieris rapae
408 observations
Pale Swallowtail
Papilio eurymedon
404 observations
Nevada Bumble Bee
Bombus nevadensis
400 observations
Clouded Sulphur
Colias philodice
397 observations
Transverse Lady Beetle
Coccinella transversoguttata
395 observations · iNaturalist
Hoary Comma
Polygonia gracilis
387 observations
White-lined Sphinx
Hyles lineata
376 observations · iNaturalist
Silvery Blue
Glaucopsyche lygdamus
374 observations
Woodland Skipper
Ochlodes sylvanoides
367 observations · iNaturalist
Great Spangled Fritillary
Argynnis cybele
367 observations · iNaturalist
Western Tiger Swallowtail
Papilio rutulus
366 observations
Eastern Boxelder Bug
Boisea trivittata
364 observations
Flame Skimmer
Libellula saturata
363 observations · iNaturalist
Two-tailed Swallowtail
Papilio multicaudata
363 observations · iNaturalist
Hayden's Ringlet
Coenonympha haydenii
335 observations · iNaturalist
Yellow Velvet Beetle
Lepturobosca chrysocoma
334 observations · iNaturalist

Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.

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