Butterflies Flying in Connecticut in October (46 Species)

46 butterflies were recorded flying in Connecticut in October in our iNaturalist sample; 1 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 Nov

Top butterflies in October

Monarch261 obs.

American Lady100 obs.

American Copper97 obs.

Small White73 obs.

Huron Skipper60 obs.

Common Buckeye55 obs.

Painted Lady51 obs.

Orange Sulphur46 obs.

Clouded Sulphur31 obs.

Eastern Comma29 obs.

Red Admiral27 obs.

Gray Hairstreak22 obs.

All butterflies flying in Connecticut in October

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	261	Aug (past peak)
2	American Lady	Vanessa virginiensis	Brush-footed Butterflies	100	Aug (past peak)
3	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	97	Aug (past peak)
4	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	73	Jul (past peak)
5	Huron Skipper	Atalopedes huron	Skippers	60	Sep (past peak)
6	Common Buckeye	Junonia coenia	Brush-footed Butterflies	55	Aug (past peak)
7	Painted Lady	Vanessa cardui	Brush-footed Butterflies	51	Sep (past peak)
8	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	46	Sep (past peak)
9	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	31	Sep (past peak)
10	Eastern Comma	Polygonia comma	Brush-footed Butterflies	29	Jul (past peak)
11	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	27	Jul (past peak)
12	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	22	Aug (past peak)
13	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	22	Aug (past peak)
14	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	17	Aug (past peak)
15	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	17	Sep (past peak)
16	Fiery Skipper	Hylephila phyleus	Skippers	16	Sep (past peak)
17	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	16	Aug (past peak)
18	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	14	Jul (past peak)
19	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	11	Aug (past peak)
20	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	11	Jul (past peak)
21	Ocola Skipper	Panoquina ocola	Skippers	10	Sep (past peak)
22	Tawny-edged Skipper	Polites themistocles	Skippers	8	Aug (past peak)
23	Viceroy	Limenitis archippus	Brush-footed Butterflies	8	Sep (past peak)
24	Silver-spotted Skipper	Epargyreus clarus	Skippers	7	Jul (past peak)
25	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	7	Sep (past peak)
26	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	6	Jul (past peak)
27	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	6	Apr (past peak)
28	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	4	Jul (past peak)
29	Peck's Skipper	Polites peckius	Skippers	4	Aug (past peak)
30	Bronze Copper	Tharsalea hyllus	Gossamer-winged Butterflies	4	Jun (past peak)
31	Eastern Tiger Swallowtail	Papilio glaucus	Swallowtails and Parnassians	3	Aug (past peak)
32	Cloudless Sulphur	Phoebis sennae	Whites, Yellows, and Sulphurs	2	Sep (past peak)
33	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	2	Jul (past peak)
34	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	2	Aug (past peak)
35	Common Checkered-Skipper	Burnsius communis	Skippers	2	Oct (peak)
36	Zabulon Skipper	Lon zabulon	Skippers	2	Aug (past peak)
37	Horace's Duskywing	Erynnis horatius	Skippers	1	Jul (past peak)
38	Least Skipper	Ancyloxypha numitor	Skippers	1	Aug (past peak)
39	Little Wood Satyr	Megisto cymela	Brush-footed Butterflies	1	Jun (past peak)
40	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	1	Jul (past peak)
41	Long-tailed Skipper	Urbanus proteus	Skippers	1	Sep (past peak)
42	Sleepy Orange	Eurema nicippe	Whites, Yellows, and Sulphurs	1	Aug (past peak)
43	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	1	Aug (past peak)
44	Summer Azure	Celastrina neglecta	Gossamer-winged Butterflies	1	Aug (past peak)
45	Appalachian Brown	Lethe appalachia	Brush-footed Butterflies	1	Jul (past peak)
46	Northern Pearly-eye	Lethe anthedon	Brush-footed Butterflies	1	Jul (past peak)