Butterflies Flying in Vermont in September (52 Species)

52 butterflies were recorded flying in Vermont in September in our iNaturalist sample; 4 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

Monarch2,486 obs.

Clouded Sulphur371 obs.

Small White369 obs.

Painted Lady352 obs.

Viceroy204 obs.

Great Spangled Fritillary185 obs.

Eastern Comma172 obs.

Eastern Giant Swallowtail146 obs.

Red Admiral124 obs.

Eastern Tailed-Blue123 obs.

Common Ringlet117 obs.

American Copper106 obs.

All butterflies flying in Vermont in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	2,486	Aug (past peak)
2	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	371	Sep (peak)
3	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	369	Aug (past peak)
4	Painted Lady	Vanessa cardui	Brush-footed Butterflies	352	Sep (peak)
5	Viceroy	Limenitis archippus	Brush-footed Butterflies	204	Aug (past peak)
6	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	185	Jul (past peak)
7	Eastern Comma	Polygonia comma	Brush-footed Butterflies	172	Jul (past peak)
8	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	146	Aug (past peak)
9	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	124	Jul (past peak)
10	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	123	Aug (past peak)
11	Common Ringlet	Coenonympha california	Brush-footed Butterflies	117	Jun (past peak)
12	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	106	Jun (past peak)
13	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	101	Apr (past peak)
14	American Lady	Vanessa virginiensis	Brush-footed Butterflies	82	Jul (past peak)
15	Milbert's Tortoiseshell	Aglais milberti	Brush-footed Butterflies	63	Jul (past peak)
16	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	59	Jul (past peak)
17	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	53	Jul (past peak)
18	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	50	Jul (past peak)
19	Atlantis Fritillary	Argynnis atlantis	Brush-footed Butterflies	49	Jul (past peak)
20	Bronze Copper	Tharsalea hyllus	Gossamer-winged Butterflies	48	Jun (past peak)
21	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	47	Aug (past peak)
22	Least Skipper	Ancyloxypha numitor	Skippers	41	Aug (past peak)
23	American Silver-bordered Fritillary	Boloria myrina	Brush-footed Butterflies	40	Jun (past peak)
24	Peck's Skipper	Polites peckius	Skippers	35	Aug (past peak)
25	Common Wood-Nymph	Cercyonis pegala	Brush-footed Butterflies	34	Jul (past peak)
26	Silver-spotted Skipper	Epargyreus clarus	Skippers	26	Jul (past peak)
27	Green Comma	Polygonia faunus	Brush-footed Butterflies	24	Aug (past peak)
28	Gray Comma	Polygonia progne	Brush-footed Butterflies	20	Jul (past peak)
29	Meadow Fritillary	Boloria bellona	Brush-footed Butterflies	18	Aug (past peak)
30	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	18	Jun (past peak)
31	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	17	Aug (past peak)
32	Appalachian Brown	Lethe appalachia	Brush-footed Butterflies	17	Jul (past peak)
33	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	16	Jul (past peak)
34	Hackberry Emperor	Asterocampa celtis	Brush-footed Butterflies	15	Jun (past peak)
35	Tawny-edged Skipper	Polites themistocles	Skippers	10	Jun (past peak)
36	Common Buckeye	Junonia coenia	Brush-footed Butterflies	9	Aug (past peak)
37	Aphrodite Fritillary	Argynnis aphrodite	Brush-footed Butterflies	9	Jul (past peak)
38	Canadian Tiger Swallowtail	Papilio canadensis	Swallowtails and Parnassians	8	Jun (past peak)
39	Northern Crescent	Phyciodes cocyta	Brush-footed Butterflies	8	Jun (past peak)
40	Northern Pearly-eye	Lethe anthedon	Brush-footed Butterflies	6	Jul (past peak)
41	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	4	Jul (past peak)
42	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	4	Jul (past peak)
43	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	4	Jun (past peak)
44	Fiery Skipper	Hylephila phyleus	Skippers	3	Sep (peak)
45	Summer Azure	Celastrina neglecta	Gossamer-winged Butterflies	3	Jul (past peak)
46	Common Sootywing	Pholisora catullus	Skippers	2	Jul (past peak)
47	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	2	Aug (past peak)
48	Long Dash	Limochores mystic	Skippers	2	Jun (past peak)
49	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	1	Sep (peak)
50	Dun Skipper	Euphyes vestris	Skippers	1	Jul (past peak)