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Insects & Arthropods of Colorado

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

111,683
recent observations
50
species listed
50
insects & arthropods

Naturalists have logged 111,683 research-grade observations across the 50 most-recorded species in Colorado. The most frequently seen is the Western Honey Bee, with 7,488 recorded sightings.

Rarer finds confirmed in Colorado include Ambush Bug - uncommon enough that a sighting is worth logging.

Ambush Bug

Most-observed insects & arthropods in Colorado

Western Honey Bee
Apis mellifera
7,488 observations
Bold Jumping Spider
Phidippus audax
5,206 observations
Painted Lady
Vanessa cardui
4,419 observations
Convergent Lady Beetle
Hippodamia convergens
4,182 observations
Seven-spotted Lady Beetle
Coccinella septempunctata
4,092 observations
White-lined Sphinx
Hyles lineata
4,038 observations · iNaturalist
Hunt's Bumble Bee
Bombus huntii
3,716 observations · iNaturalist
Monarch
Danaus plexippus
3,116 observations
European Paper Wasp
Polistes dominula
3,057 observations
Two-tailed Swallowtail
Papilio multicaudata
2,920 observations · iNaturalist
Asian Lady Beetle
Harmonia axyridis
2,852 observations
Two-striped Grasshopper
Melanoplus bivittatus
2,808 observations · iNaturalist
Japanese Beetle
Popillia japonica
2,664 observations
European Mantis
Mantis religiosa
2,587 observations
Common Checkered-Skipper
Burnsius communis
2,335 observations · iNaturalist
Weidemeyer's Admiral
Limenitis weidemeyerii
2,326 observations
Small White
Pieris rapae
2,274 observations
Police Car Moth
Gnophaela vermiculata
2,253 observations · iNaturalist
Four-spotted Moth
Tyta luctuosa
2,099 observations · iNaturalist
Western Black Widow
Latrodectus hesperus
2,016 observations
Blue Fungus Beetle
Cypherotylus californicus
1,940 observations · iNaturalist
Brown-belted Bumble Bee
Bombus griseocollis
1,936 observations
Variegated Fritillary
Euptoieta claudia
1,924 observations
Eastern Boxelder Bug
Boisea trivittata
1,819 observations
Rocky Mountain Parnassian
Parnassius smintheus
1,774 observations · iNaturalist
Western Conifer Seed Bug
Leptoglossus occidentalis
1,773 observations · iNaturalist
Mourning Cloak
Nymphalis antiopa
1,725 observations
Band-winged Meadowhawk
Sympetrum semicinctum
1,696 observations · iNaturalist
Nevada Bumble Bee
Bombus nevadensis
1,663 observations
Variegated Meadowhawk
Sympetrum corruptum
1,627 observations · iNaturalist
Colorado Soldier Beetle
Chauliognathus basalis
1,610 observations · iNaturalist
Apache Jumping Spider
Phidippus apacheanus
1,602 observations · iNaturalist
Golden Northern Bumble Bee
Bombus fervidus
1,594 observations
Widow Skimmer
Libellula luctuosa
1,592 observations
Small Milkweed Bug
Lygaeus kalmii
1,548 observations
Western Tiger Swallowtail
Papilio rutulus
1,528 observations
Taxiles Skipper
Lon taxiles
1,469 observations · iNaturalist
American Bumble Bee
Bombus pensylvanicus
1,449 observations
Checkered White
Pontia protodice
1,428 observations · iNaturalist
Hoary Comma
Polygonia gracilis
1,369 observations
Differential Grasshopper
Melanoplus differentialis
1,351 observations
Red-femured Milkweed Borer
Tetraopes femoratus
1,273 observations · iNaturalist
Greater Anglewing
Microcentrum rhombifolium
1,248 observations · iNaturalist
Jagged Ambush Bug
Phymata americana
1,245 observations
Spotted Tussock Moth
Lophocampa maculata
1,227 observations
Red Admiral
Vanessa atalanta
1,186 observations
White-spotted Sawyer
Monochamus scutellatus
1,186 observations
Ornate Checkered Beetle
Trichodes ornatus
1,164 observations
Gray Hairstreak
Strymon melinus
1,157 observations
Great Spreadwing
Archilestes grandis
1,132 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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