Butterflies Flying in Indiana in September (60 Species)

60 butterflies were recorded flying in Indiana 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

Monarch2,002 obs.

Common Buckeye977 obs.

Painted Lady965 obs.

Small White695 obs.

Silver-spotted Skipper650 obs.

Peck's Skipper509 obs.

Black Swallowtail425 obs.

Huron Skipper327 obs.

Pearl Crescent317 obs.

Eastern Tiger Swallowtail302 obs.

Eastern Tailed-Blue290 obs.

Fiery Skipper279 obs.

All butterflies flying in Indiana in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	2,002	Aug (past peak)
2	Common Buckeye	Junonia coenia	Brush-footed Butterflies	977	Sep (peak)
3	Painted Lady	Vanessa cardui	Brush-footed Butterflies	965	Sep (peak)
4	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	695	Sep (peak)
5	Silver-spotted Skipper	Epargyreus clarus	Skippers	650	Aug (past peak)
6	Peck's Skipper	Polites peckius	Skippers	509	Sep (peak)
7	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	425	Aug (past peak)
8	Huron Skipper	Atalopedes huron	Skippers	327	Sep (peak)
9	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	317	Aug (past peak)
10	Eastern Tiger Swallowtail	Papilio glaucus	Swallowtails and Parnassians	302	Aug (past peak)
11	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	290	Aug (past peak)
12	Fiery Skipper	Hylephila phyleus	Skippers	279	Sep (peak)
13	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	279	Sep (peak)
14	Viceroy	Limenitis archippus	Brush-footed Butterflies	223	Sep (peak)
15	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	210	Sep (peak)
16	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	164	Jun (past peak)
17	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	145	Jul (past peak)
18	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	138	Jul (past peak)
19	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	136	Jul (past peak)
20	Hackberry Emperor	Asterocampa celtis	Brush-footed Butterflies	132	Aug (past peak)
21	Eastern Comma	Polygonia comma	Brush-footed Butterflies	121	Aug (past peak)
22	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	120	Jun (past peak)
23	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	98	Aug (past peak)
24	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	98	Aug (past peak)
25	Common Checkered-Skipper	Burnsius communis	Skippers	82	Sep (peak)
26	Cloudless Sulphur	Phoebis sennae	Whites, Yellows, and Sulphurs	63	Sep (peak)
27	American Snout	Libytheana carinenta	Brush-footed Butterflies	62	Jul (past peak)
28	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	56	Jul (past peak)
29	Meadow Fritillary	Boloria bellona	Brush-footed Butterflies	53	Sep (peak)
30	Least Skipper	Ancyloxypha numitor	Skippers	43	Aug (past peak)
31	Summer Azure	Celastrina neglecta	Gossamer-winged Butterflies	42	Jul (past peak)
32	Tawny-edged Skipper	Polites themistocles	Skippers	41	Aug (past peak)
33	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	36	Mar (past peak)
34	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	33	Aug (past peak)
35	American Lady	Vanessa virginiensis	Brush-footed Butterflies	28	May (past peak)
36	Tawny Emperor	Asterocampa clyton	Brush-footed Butterflies	28	Aug (past peak)
37	Northern Pearly-eye	Lethe anthedon	Brush-footed Butterflies	28	Aug (past peak)
38	Zabulon Skipper	Lon zabulon	Skippers	24	Aug (past peak)
39	Little Yellow	Eurema lisa	Whites, Yellows, and Sulphurs	22	Aug (past peak)
40	Eastern Gemmed-Satyr	Cyllopsis gemma	Brush-footed Butterflies	17	Aug (past peak)
41	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	16	Sep (peak)
42	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	15	Aug (past peak)
43	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	14	Jul (past peak)
44	Silvery Checkerspot	Chlosyne nycteis	Brush-footed Butterflies	13	Jul (past peak)
45	Zebra Swallowtail	Eurytides marcellus	Swallowtails and Parnassians	11	Jun (past peak)
46	Bronze Copper	Tharsalea hyllus	Gossamer-winged Butterflies	11	Jul (past peak)
47	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	11	Jul (past peak)
48	Dainty Sulphur	Nathalis iole	Whites, Yellows, and Sulphurs	7	Sep (peak)
49	Checkered White	Pontia protodice	Whites, Yellows, and Sulphurs	7	Aug (past peak)
50	Ocola Skipper	Panoquina ocola	Skippers	7	Oct (rising)