Insects & Arthropods of Illinois
The insects & arthropods most often spotted in Illinois, ranked by recent research-grade observations.
311,153
recent observations
50
species listed
50
insects & arthropods
Naturalists have logged 311,153 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the Common Eastern Bumble Bee, with 24,508 recorded sightings.
Most-observed insects & arthropods in Illinois
Common Eastern Bumble Bee
Bombus impatiens
24,508 observations
Monarch
Danaus plexippus
21,974 observations
Brown-belted Bumble Bee
Bombus griseocollis
19,543 observations
Western Honey Bee
Apis mellifera
16,328 observations
Eastern Carpenter Bee
Xylocopa virginica
10,046 observations
Black Swallowtail
Papilio polyxenes
10,000 observations
Asian Lady Beetle
Harmonia axyridis
9,879 observations
Two-spotted Bumble Bee
Bombus bimaculatus
9,352 observations
Eastern Tiger Swallowtail
Papilio glaucus
8,773 observations
Red Admiral
Vanessa atalanta
8,020 observations
Silver-spotted Skipper
Epargyreus clarus
7,604 observations
Pearl Crescent
Phyciodes tharos
7,525 observations
Common Buckeye
Junonia coenia
6,771 observations
Large Milkweed Bug
Oncopeltus fasciatus
6,302 observations
Small White
Pieris rapae
6,198 observations
Ligated Furrow Bee
Halictus ligatus
5,457 observations · iNaturalist
Red-spotted Admiral
Limenitis arthemis
5,394 observations
Eastern Tailed-Blue
Everes comyntas
5,233 observations
Common Whitetail
Plathemis lydia
5,013 observations
Bold Jumping Spider
Phidippus audax
4,677 observations
Painted Lady
Vanessa cardui
4,655 observations
Red Milkweed Beetle
Tetraopes tetrophthalmus
4,536 observations
Japanese Beetle
Popillia japonica
4,492 observations
Black-and-gold Bumble Bee
Bombus auricomus
4,481 observations
Ailanthus Webworm Moth
Atteva aurea
4,466 observations · iNaturalist
Fiery Skipper
Hylephila phyleus
4,425 observations · iNaturalist
Blue Dasher
Pachydiplax longipennis
4,412 observations
Goldenrod Soldier Beetle
Chauliognathus pensylvanicus
4,310 observations · iNaturalist
Widow Skimmer
Libellula luctuosa
4,234 observations
Eastern Pondhawk
Erythemis simplicicollis
4,162 observations
Hackberry Emperor
Asterocampa celtis
4,127 observations
Pipevine Swallowtail
Battus philenor
4,038 observations
Spicebush Swallowtail
Papilio troilus
3,738 observations
Margined Calligrapher
Toxomerus marginatus
3,638 observations · iNaturalist
Six-spotted Tiger Beetle
Cicindela sexguttata
3,582 observations
Carolina Mantis
Stagmomantis carolina
3,571 observations
Eastern Forktail
Ischnura verticalis
3,560 observations
Isabella Tiger Moth
Pyrrharctia isabella
3,525 observations
Orange Sulphur
Colias eurytheme
3,478 observations
Differential Grasshopper
Melanoplus differentialis
3,384 observations
Chinese Mantis
Tenodera sinensis
3,315 observations
Brown Marmorated Stink Bug
Halyomorpha halys
3,307 observations
Northern Paper Wasp
Polistes fuscatus
3,301 observations
Question Mark
Polygonia interrogationis
3,282 observations
Bald-faced Hornet
Dolichovespula maculata
3,271 observations
Green Cloverworm Moth
Hypena scabra
3,207 observations · iNaturalist
Peck's Skipper
Polites peckius
3,153 observations · iNaturalist
Zabulon Skipper
Lon zabulon
3,070 observations · iNaturalist
North American Wheel Bug
Arilus cristatus
2,997 observations
Two-spotted Longhorn Bee
Melissodes bimaculatus
2,839 observations
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