Insects & Arthropods of Pennsylvania
The insects & arthropods most often spotted in Pennsylvania, ranked by recent research-grade observations.
Most-observed insects & arthropods in Pennsylvania
Spotted Lanternfly
Lycorma delicatula
21,040 observations · iNaturalist
Common Eastern Bumble Bee
Bombus impatiens
15,493 observations
Monarch
Danaus plexippus
15,322 observations
Asian Lady Beetle
Harmonia axyridis
14,401 observations
Western Honey Bee
Apis mellifera
12,296 observations
Eastern Tiger Swallowtail
Papilio glaucus
10,431 observations
Eastern Carpenter Bee
Xylocopa virginica
8,046 observations
Huron Skipper
Atalopedes huron
7,127 observations · iNaturalist
Isabella Tiger Moth
Pyrrharctia isabella
7,011 observations
Small White
Pieris rapae
6,638 observations
Silver-spotted Skipper
Epargyreus clarus
6,575 observations
Black Swallowtail
Papilio polyxenes
6,096 observations
Red-spotted Admiral
Limenitis arthemis
6,089 observations
Hickory Tussock Moth
Lophocampa caryae
5,745 observations
Eastern Tent Caterpillar Moth
Malacosoma americana
5,489 observations · iNaturalist
Bold Jumping Spider
Phidippus audax
5,164 observations
Spicebush Swallowtail
Papilio troilus
5,016 observations
Spongy Moth
Lymantria dispar
4,775 observations
Orchard Orbweaver
Leucauge venusta
4,763 observations
Chinese Mantis
Tenodera sinensis
4,684 observations
Large Milkweed Bug
Oncopeltus fasciatus
4,515 observations
Zabulon Skipper
Lon zabulon
4,460 observations · iNaturalist
Red Admiral
Vanessa atalanta
4,452 observations
Great Spangled Fritillary
Argynnis cybele
4,446 observations · iNaturalist
Brown-belted Bumble Bee
Bombus griseocollis
4,406 observations
Pearl Crescent
Phyciodes tharos
4,287 observations
Brown Marmorated Stink Bug
Halyomorpha halys
4,267 observations
Red Milkweed Beetle
Tetraopes tetrophthalmus
4,162 observations
Eastern Boxelder Bug
Boisea trivittata
4,139 observations
Japanese Beetle
Popillia japonica
4,108 observations
Common Whitetail
Plathemis lydia
3,896 observations
Ebony Jewelwing
Calopteryx maculata
3,741 observations
Bald-faced Hornet
Dolichovespula maculata
3,705 observations
North American Wheel Bug
Arilus cristatus
3,700 observations
Giant Leopard Moth
Hypercompe scribonia
3,641 observations · iNaturalist
Peck's Skipper
Polites peckius
3,577 observations · iNaturalist
Eastern Tailed-Blue
Cupido comyntas
3,518 observations · iNaturalist
Blue Dasher
Pachydiplax longipennis
3,493 observations
Banded Tussock Moth
Halysidota tessellaris
3,344 observations
Polyphemus Moth
Antheraea polyphemus
3,273 observations
Margined Calligrapher
Toxomerus marginatus
3,259 observations · iNaturalist
Ailanthus Webworm Moth
Atteva aurea
3,236 observations · iNaturalist
Eastern Black Carpenter Ant
Camponotus pennsylvanicus
3,119 observations
Two-spotted Bumble Bee
Bombus bimaculatus
3,118 observations
Oriental Beetle
Exomala orientalis
3,076 observations · iNaturalist
Northern Paper Wasp
Polistes fuscatus
3,072 observations
Tan Jumping Spider
Platycryptus undatus
3,071 observations · iNaturalist
Dark Fishing Spider
Dolomedes tenebrosus
3,000 observations
Pale Beauty
Campaea perlata
2,883 observations · iNaturalist
Western Conifer Seed Bug
Leptoglossus occidentalis
2,861 observations · iNaturalist