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Insects & Arthropods of Connecticut

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

87,354
recent observations
50
species listed
50
insects & arthropods

Naturalists have logged 87,354 research-grade observations across the 50 most-recorded species in Connecticut. The most frequently seen is the Common Eastern Bumble Bee, with 8,419 recorded sightings.

Most-observed insects & arthropods in Connecticut

Common Eastern Bumble Bee
Bombus impatiens
8,419 observations
Monarch
Danaus plexippus
5,353 observations
Asian Lady Beetle
Harmonia axyridis
4,462 observations
Spotted Lanternfly
Lycorma delicatula
3,934 observations
Western Honey Bee
Apis mellifera
3,615 observations
Eastern Tiger Swallowtail
Papilio glaucus
2,234 observations
Brown-belted Bumble Bee
Bombus griseocollis
2,129 observations
Eastern Carpenter Bee
Xylocopa virginica
2,004 observations
Ligated Furrow Bee
Halictus ligatus
1,975 observations · iNaturalist
Black Swallowtail
Papilio polyxenes
1,908 observations
Blue Dasher
Pachydiplax longipennis
1,818 observations
Isabella Tiger Moth
Pyrrharctia isabella
1,810 observations
Two-spotted Bumble Bee
Bombus bimaculatus
1,706 observations
Spicebush Swallowtail
Papilio troilus
1,705 observations
Silver-spotted Skipper
Epargyreus clarus
1,675 observations
Spongy Moth
Lymantria dispar
1,655 observations
Hickory Tussock Moth
Lophocampa caryae
1,651 observations
Small White
Pieris rapae
1,643 observations
Oriental Beetle
Exomala orientalis
1,598 observations · iNaturalist
Eastern Tent Caterpillar Moth
Malacosoma americana
1,470 observations · iNaturalist
Great Spangled Fritillary
Argynnis cybele
1,417 observations · iNaturalist
Huron Skipper
Atalopedes huron
1,404 observations · iNaturalist
Orchard Orbweaver
Leucauge venusta
1,335 observations
Northern Paper Wasp
Polistes fuscatus
1,322 observations
Margined Calligrapher
Toxomerus marginatus
1,299 observations · iNaturalist
Zabulon Skipper
Lon zabulon
1,290 observations · iNaturalist
Common Whitetail
Plathemis lydia
1,256 observations
Eastern Calligrapher
Toxomerus geminatus
1,240 observations
American Nursery Web Spider
Pisaurina mira
1,212 observations · iNaturalist
Peck's Skipper
Polites peckius
1,206 observations · iNaturalist
Broad-necked Root Borer
Prionus laticollis
1,202 observations · iNaturalist
Chinese Mantis
Tenodera sinensis
1,200 observations
Elegant Grass-veneer
Microcrambus elegans
1,195 observations · iNaturalist
Ebony Jewelwing
Calopteryx maculata
1,179 observations
Bold Jumping Spider
Phidippus audax
1,173 observations
Eastern Pondhawk
Erythemis simplicicollis
1,143 observations
Winter Firefly
Photinus corruscus
1,115 observations · iNaturalist
Japanese Beetle
Popillia japonica
1,103 observations
Brown Marmorated Stink Bug
Halyomorpha halys
1,103 observations
Lesser Maple Spanworm Moth
Macaria pustularia
1,101 observations · iNaturalist
Pale Beauty
Campaea perlata
1,092 observations · iNaturalist
Pale Green Assassin Bug
Zelus luridus
1,076 observations
Western Conifer Seed Bug
Leptoglossus occidentalis
1,070 observations · iNaturalist
Ailanthus Webworm Moth
Atteva aurea
1,053 observations · iNaturalist
American Lady
Vanessa virginiensis
1,016 observations
Bald-faced Hornet
Dolichovespula maculata
1,012 observations
Acanthocephala terminalis
Acanthocephala terminalis
980 observations · iNaturalist
Bicolored Striped Sweat Bee
Agapostemon virescens
957 observations
Polyphemus Moth
Antheraea polyphemus
936 observations
Large Milkweed Bug
Oncopeltus fasciatus
903 observations

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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