Butterflies Flying in Maine in September (55 Species)

55 butterflies were recorded flying in Maine in September in our iNaturalist sample; 9 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Apr May Jun Jul Aug Sep Oct

Top butterflies in September

Monarch1,166 obs.

American Lady296 obs.

Small White241 obs.

Clouded Sulphur217 obs.

Red Admiral151 obs.

Great Spangled Fritillary147 obs.

Mourning Cloak125 obs.

Painted Lady110 obs.

Common Ringlet105 obs.

American Copper87 obs.

Question Mark73 obs.

Eastern Tailed-Blue66 obs.

All butterflies flying in Maine in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	1,166	Aug (past peak)
2	American Lady	Vanessa virginiensis	Brush-footed Butterflies	296	Aug (past peak)
3	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	241	Aug (past peak)
4	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	217	Sep (peak)
5	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	151	Jul (past peak)
6	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	147	Jul (past peak)
7	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	125	Apr (past peak)
8	Painted Lady	Vanessa cardui	Brush-footed Butterflies	110	Aug (past peak)
9	Common Ringlet	Coenonympha california	Brush-footed Butterflies	105	Jun (past peak)
10	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	87	Aug (past peak)
11	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	73	Sep (peak)
12	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	66	Aug (past peak)
13	Viceroy	Limenitis archippus	Brush-footed Butterflies	53	Aug (past peak)
14	Peck's Skipper	Polites peckius	Skippers	52	Jul (past peak)
15	Northern Crescent	Phyciodes cocyta	Brush-footed Butterflies	51	Jun (past peak)
16	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	44	Sep (peak)
17	Common Wood-Nymph	Cercyonis pegala	Brush-footed Butterflies	44	Aug (past peak)
18	Common Buckeye	Junonia coenia	Brush-footed Butterflies	32	Sep (peak)
19	Atlantis Fritillary	Argynnis atlantis	Brush-footed Butterflies	27	Jul (past peak)
20	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	23	Jul (past peak)
21	Canadian Tiger Swallowtail	Papilio canadensis	Swallowtails and Parnassians	18	Jun (past peak)
22	Aphrodite Fritillary	Argynnis aphrodite	Brush-footed Butterflies	17	Jul (past peak)
23	Least Skipper	Ancyloxypha numitor	Skippers	16	Aug (past peak)
24	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	14	Aug (past peak)
25	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	13	Aug (past peak)
26	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	12	Aug (past peak)
27	Silver-spotted Skipper	Epargyreus clarus	Skippers	12	Jul (past peak)
28	American Silver-bordered Fritillary	Boloria myrina	Brush-footed Butterflies	12	Aug (past peak)
29	Gray Comma	Polygonia progne	Brush-footed Butterflies	8	May (past peak)
30	Green Comma	Polygonia faunus	Brush-footed Butterflies	8	Aug (past peak)
31	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	7	Sep (peak)
32	Milbert's Tortoiseshell	Aglais milberti	Brush-footed Butterflies	7	Aug (past peak)
33	Zabulon Skipper	Lon zabulon	Skippers	7	Aug (past peak)
34	Bronze Copper	Tharsalea hyllus	Gossamer-winged Butterflies	7	Jun (past peak)
35	Eastern Comma	Polygonia comma	Brush-footed Butterflies	6	Jul (past peak)
36	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	6	Sep (peak)
37	Tawny-edged Skipper	Polites themistocles	Skippers	5	Jun (past peak)
38	Meadow Fritillary	Boloria bellona	Brush-footed Butterflies	5	Aug (past peak)
39	Summer Azure	Celastrina neglecta	Gossamer-winged Butterflies	5	Jul (past peak)
40	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	5	Aug (past peak)
41	Ocola Skipper	Panoquina ocola	Skippers	5	Sep (peak)
42	Fiery Skipper	Hylephila phyleus	Skippers	4	Oct (rising)
43	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	4	Jul (past peak)
44	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	4	Aug (past peak)
45	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	3	Jun (past peak)
46	Long Dash	Limochores mystic	Skippers	3	Jul (past peak)
47	Cloudless Sulphur	Phoebis sennae	Whites, Yellows, and Sulphurs	2	Sep (peak)
48	Broad-winged Skipper	Poanes viator	Skippers	2	Aug (past peak)
49	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	2	Aug (past peak)
50	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	2	Sep (peak)