Insects & Arthropods of Pennsylvania

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

321,063

recent observations

50

species listed

50

insects & arthropods

Naturalists have logged 321,063 research-grade observations across the 50 most-recorded species in Pennsylvania. The most frequently seen is the Spotted Lanternfly, with 22,750 recorded sightings.

Most-observed insects & arthropods in Pennsylvania

Spotted Lanternfly

Lycorma delicatula

22,750 observations

Danaus plexippus

19,765 observations

Common Eastern Bumble Bee

Bombus impatiens

17,286 observations

Asian Lady Beetle

Harmonia axyridis

15,341 observations

Western Honey Bee

13,740 observations

Eastern Tiger Swallowtail

Papilio glaucus

13,231 observations

Eastern Carpenter Bee

Xylocopa virginica

9,092 observations

Atalopedes huron

8,426 observations · iNaturalist

Silver-spotted Skipper

Epargyreus clarus

8,082 observations

7,723 observations

Isabella Tiger Moth

Pyrrharctia isabella

7,642 observations

Red-spotted Admiral

Limenitis arthemis

7,325 observations

Hickory Tussock Moth

Lophocampa caryae

7,174 observations

Black Swallowtail

Papilio polyxenes

7,138 observations

Spicebush Swallowtail

Papilio troilus

6,218 observations

Eastern Tent Caterpillar Moth

Malacosoma americana

5,612 observations · iNaturalist

Bold Jumping Spider

Phidippus audax

5,543 observations

Great Spangled Fritillary

Argynnis cybele

5,310 observations · iNaturalist

Zabulon Skipper

5,305 observations · iNaturalist

Orchard Orbweaver

Leucauge venusta

5,161 observations

Large Milkweed Bug

Oncopeltus fasciatus

5,013 observations

Tenodera sinensis

4,949 observations

Lymantria dispar

4,910 observations

Japanese Beetle

Popillia japonica

4,874 observations

Vanessa atalanta

4,863 observations

Brown-belted Bumble Bee

Bombus griseocollis

4,821 observations

Red Milkweed Beetle

Tetraopes tetrophthalmus

4,724 observations

Phyciodes tharos

4,661 observations

Banded Tussock Moth

Halysidota tessellaris

4,610 observations

Brown Marmorated Stink Bug

Halyomorpha halys

4,406 observations

Polites peckius

4,349 observations · iNaturalist

Common Whitetail

Plathemis lydia

4,343 observations

Eastern Boxelder Bug

Boisea trivittata

4,243 observations

Ebony Jewelwing

Calopteryx maculata

4,237 observations

Eastern Tailed-Blue

Everes comyntas

4,165 observations

Bald-faced Hornet

Dolichovespula maculata

3,988 observations

Pachydiplax longipennis

3,958 observations

Giant Leopard Moth

Hypercompe scribonia

3,897 observations · iNaturalist

North American Wheel Bug

Arilus cristatus

3,861 observations

Polyphemus Moth

Antheraea polyphemus

3,849 observations

Margined Calligrapher

Toxomerus marginatus

3,578 observations · iNaturalist

Ailanthus Webworm Moth

3,575 observations · iNaturalist

Oriental Beetle

Exomala orientalis

3,568 observations · iNaturalist

Milkweed Tussock Moth

3,541 observations

Tan Jumping Spider

Platycryptus undatus

3,462 observations · iNaturalist

Carolina Mantis

Stagmomantis carolina

3,450 observations

Two-spotted Bumble Bee

Bombus bimaculatus

3,346 observations

Green Stink Bug

Chinavia hilaris

3,339 observations · iNaturalist

Northern Paper Wasp

Polistes fuscatus

3,323 observations

Eastern Black Carpenter Ant

Camponotus pennsylvanicus

3,296 observations

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