Butterflies Flying in New Jersey in September (60 Species)

60 butterflies were recorded flying in New Jersey in September in our iNaturalist sample; 14 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Mar Apr May Jun Jul Aug Sep Oct Nov

Top butterflies in September

Monarch2,430 obs.

Huron Skipper1,534 obs.

Common Buckeye749 obs.

Black Swallowtail495 obs.

Small White432 obs.

Peck's Skipper391 obs.

Eastern Tailed-Blue383 obs.

Eastern Tiger Swallowtail315 obs.

Gray Hairstreak302 obs.

Pearl Crescent295 obs.

American Lady281 obs.

Red-banded Hairstreak250 obs.

All butterflies flying in New Jersey in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	2,430	Aug (past peak)
2	Huron Skipper	Atalopedes huron	Skippers	1,534	Sep (peak)
3	Common Buckeye	Junonia coenia	Brush-footed Butterflies	749	Sep (peak)
4	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	495	Aug (past peak)
5	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	432	Jul (past peak)
6	Peck's Skipper	Polites peckius	Skippers	391	Jul (past peak)
7	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	383	Sep (peak)
8	Eastern Tiger Swallowtail	Papilio glaucus	Swallowtails and Parnassians	315	Jul (past peak)
9	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	302	Sep (peak)
10	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	295	Jul (past peak)
11	American Lady	Vanessa virginiensis	Brush-footed Butterflies	281	May (past peak)
12	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	250	Aug (past peak)
13	Silver-spotted Skipper	Epargyreus clarus	Skippers	241	Aug (past peak)
14	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	238	Aug (past peak)
15	Painted Lady	Vanessa cardui	Brush-footed Butterflies	235	Sep (peak)
16	Cloudless Sulphur	Phoebis sennae	Whites, Yellows, and Sulphurs	215	Sep (peak)
17	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	215	Aug (past peak)
18	Fiery Skipper	Hylephila phyleus	Skippers	203	Sep (peak)
19	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	182	Sep (peak)
20	Viceroy	Limenitis archippus	Brush-footed Butterflies	157	Sep (peak)
21	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	156	Aug (past peak)
22	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	124	Jul (past peak)
23	Least Skipper	Ancyloxypha numitor	Skippers	111	Aug (past peak)
24	Ocola Skipper	Panoquina ocola	Skippers	100	Sep (peak)
25	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	95	Jul (past peak)
26	Zabulon Skipper	Lon zabulon	Skippers	93	Aug (past peak)
27	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	91	Aug (past peak)
28	Long-tailed Skipper	Urbanus proteus	Skippers	83	Sep (peak)
29	Eastern Comma	Polygonia comma	Brush-footed Butterflies	77	Aug (past peak)
30	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	75	Jun (past peak)
31	Summer Azure	Celastrina neglecta	Gossamer-winged Butterflies	56	Jun (past peak)
32	Common Checkered-Skipper	Burnsius communis	Skippers	54	Oct (rising)
33	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	52	Mar (past peak)
34	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	51	Sep (peak)
35	Common Wood-Nymph	Cercyonis pegala	Brush-footed Butterflies	48	Jul (past peak)
36	Sleepy Orange	Eurema nicippe	Whites, Yellows, and Sulphurs	47	Jul (past peak)
37	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	45	Aug (past peak)
38	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	45	Sep (peak)
39	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	42	Aug (past peak)
40	Horace's Duskywing	Erynnis horatius	Skippers	35	Jul (past peak)
41	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	32	Jul (past peak)
42	American Snout	Libytheana carinenta	Brush-footed Butterflies	32	Jul (past peak)
43	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	30	Aug (past peak)
44	Brazilian Skipper	Calpodes ethlius	Skippers	28	Sep (peak)
45	Tawny Emperor	Asterocampa clyton	Brush-footed Butterflies	27	Jun (past peak)
46	Salt Marsh Skipper	Panoquina panoquin	Skippers	27	Jul (past peak)
47	Appalachian Brown	Lethe appalachia	Brush-footed Butterflies	22	Aug (past peak)
48	Little Yellow	Eurema lisa	Whites, Yellows, and Sulphurs	18	Aug (past peak)
49	Hackberry Emperor	Asterocampa celtis	Brush-footed Butterflies	17	Aug (past peak)
50	Broad-winged Skipper	Poanes viator	Skippers	16	Jul (past peak)