Insects & Arthropods of Montana
The insects & arthropods most often spotted in Montana, ranked by recent research-grade observations.
Most-observed insects & arthropods in Montana
Vancouver Bumble Bee
Bombus vancouverensis
926 observations · iNaturalist
White-spotted Sawyer
Monochamus scutellatus
896 observations
California Tortoiseshell
Nymphalis californica
774 observations
Spotted Tussock Moth
Lophocampa maculata
745 observations
Hunt's Bumble Bee
Bombus huntii
714 observations · iNaturalist
Western Honey Bee
Apis mellifera
671 observations
Mourning Cloak
Nymphalis antiopa
660 observations
Essex Skipper
Thymelicus lineola
652 observations · iNaturalist
Western Tent Caterpillar Moth
Malacosoma californica
647 observations · iNaturalist
Leafy Spurge Hawkmoth
Hyles euphorbiae
626 observations · iNaturalist
Western Conifer Seed Bug
Leptoglossus occidentalis
602 observations · iNaturalist
Lorquin's Admiral
Limenitis lorquini
582 observations
Police Car Moth
Gnophaela vermiculata
578 observations · iNaturalist
Milbert's Tortoiseshell
Aglais milberti
546 observations · iNaturalist
Painted Lady
Vanessa cardui
542 observations
Boisduval's Blue
Icaricia icarioides
530 observations · iNaturalist
Two-striped Grasshopper
Melanoplus bivittatus
517 observations · iNaturalist
European Mantis
Mantis religiosa
502 observations
Rocky Mountain Parnassian
Parnassius smintheus
500 observations · iNaturalist
Goldenrod Crab Spider
Misumena vatia
458 observations
Common Alpine
Erebia epipsodea
431 observations · iNaturalist
Ornate Checkered Beetle
Trichodes ornatus
425 observations
Mormon Fritillary
Argynnis mormonia
408 observations · iNaturalist
Banded Garden Spider
Argiope trifasciata
406 observations · iNaturalist
Seven-spotted Lady Beetle
Coccinella septempunctata
399 observations
Anise Swallowtail
Papilio zelicaon
397 observations
Asian Lady Beetle
Harmonia axyridis
388 observations
Common Ringlet
Coenonympha california
387 observations
Pale Swallowtail
Papilio eurymedon
383 observations
Green Comma
Polygonia faunus
383 observations
Mormon Cricket
Anabrus simplex
379 observations · iNaturalist
Nevada Bumble Bee
Bombus nevadensis
371 observations
Common Wood-Nymph
Cercyonis pegala
367 observations
Silvery Blue
Glaucopsyche lygdamus
365 observations
White-lined Sphinx
Hyles lineata
356 observations · iNaturalist
Western Tiger Swallowtail
Papilio rutulus
350 observations
Small White
Pieris rapae
344 observations
Transverse Lady Beetle
Coccinella transversoguttata
334 observations · iNaturalist
Common Drone Fly
Eristalis tenax
327 observations
Small Wood-Nymph
Cercyonis oetus
322 observations · iNaturalist
Yellow Velvet Beetle
Lepturobosca chrysocoma
321 observations · iNaturalist
Two-tailed Swallowtail
Papilio multicaudata
306 observations · iNaturalist
Indiscriminate Cuckoo Bumble Bee
Bombus insularis
303 observations · iNaturalist
Hayden's Ringlet
Coenonympha haydenii
300 observations · iNaturalist
Woodland Skipper
Ochlodes sylvanoides
298 observations · iNaturalist
Red-belted Bumble Bee
Bombus rufocinctus
296 observations
Eastern Boxelder Bug
Boisea trivittata
294 observations
Zebra Jumping Spider
Salticus scenicus
288 observations · iNaturalist
Western White
Pontia occidentalis
280 observations
Mariposa Copper
Tharsalea mariposa
280 observations · iNaturalist