Butterflies Flying in Connecticut in May (57 Species)

57 butterflies were recorded flying in Connecticut in May in our iNaturalist sample; 7 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 May

Eastern Tiger Swallowtail157 obs.

Spicebush Swallowtail153 obs.

Eastern Tailed-Blue124 obs.

Juvenal's Duskywing123 obs.

American Lady122 obs.

Little Wood Satyr117 obs.

Zabulon Skipper111 obs.

Red Admiral103 obs.

American Copper97 obs.

Pearl Crescent88 obs.

Eastern Pine Elfin77 obs.

Peck's Skipper72 obs.

All butterflies flying in Connecticut in May

#	Species	Scientific name	Family	Obs.	Peak in state
1	Eastern Tiger Swallowtail	Papilio glaucus	Swallowtails and Parnassians	157	Aug (rising)
2	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	153	Aug (rising)
3	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	124	Aug (rising)
4	Juvenal's Duskywing	Erynnis juvenalis	Skippers	123	May (peak)
5	American Lady	Vanessa virginiensis	Brush-footed Butterflies	122	Aug (rising)
6	Little Wood Satyr	Megisto cymela	Brush-footed Butterflies	117	Jun (rising)
7	Zabulon Skipper	Lon zabulon	Skippers	111	Aug (rising)
8	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	103	Jul (rising)
9	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	97	Aug (rising)
10	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	88	Jul (rising)
11	Eastern Pine Elfin	Callophrys niphon	Gossamer-winged Butterflies	77	May (peak)
12	Peck's Skipper	Polites peckius	Skippers	72	Aug (rising)
13	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	61	Apr (past peak)
14	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	60	Jul (rising)
15	Falcate Orangetip	Anthocharis midea	Whites, Yellows, and Sulphurs	55	May (peak)
16	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	52	Aug (rising)
17	Monarch	Danaus plexippus	Brush-footed Butterflies	44	Aug (rising)
18	Hobomok Skipper	Lon hobomok	Skippers	41	Jun (rising)
19	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	36	Jul (rising)
20	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	30	Jul (rising)
21	Brown Elfin	Callophrys augustinus	Gossamer-winged Butterflies	26	May (peak)
22	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	26	Jul (rising)
23	Juniper Hairstreak	Callophrys gryneus	Gossamer-winged Butterflies	22	May (peak)
24	Silvery Blue	Glaucopsyche lygdamus	Gossamer-winged Butterflies	21	May (peak)
25	Tawny-edged Skipper	Polites themistocles	Skippers	21	Aug (rising)
26	Silver-spotted Skipper	Epargyreus clarus	Skippers	21	Jul (rising)
27	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	17	Sep (rising)
28	Common Ringlet	Coenonympha california	Brush-footed Butterflies	16	Jun (rising)
29	Painted Lady	Vanessa cardui	Brush-footed Butterflies	14	Sep (rising)
30	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	14	Aug (rising)
31	Eastern Comma	Polygonia comma	Brush-footed Butterflies	12	Jul (rising)
32	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	11	Aug (rising)
33	Spring Azure	Celastrina ladon	Gossamer-winged Butterflies	11	Apr (past peak)
34	Huron Skipper	Atalopedes huron	Skippers	11	Sep (rising)
35	Viceroy	Limenitis archippus	Brush-footed Butterflies	9	Sep (rising)
36	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	9	Sep (rising)
37	Long Dash	Limochores mystic	Skippers	9	Jun (rising)
38	Common Sootywing	Pholisora catullus	Skippers	8	Aug (rising)
39	Common Buckeye	Junonia coenia	Brush-footed Butterflies	7	Aug (rising)
40	American Silver-bordered Fritillary	Boloria myrina	Brush-footed Butterflies	7	Jul (rising)
41	Dreamy Duskywing	Erynnis icelus	Skippers	6	May (peak)
42	Canadian Tiger Swallowtail	Papilio canadensis	Swallowtails and Parnassians	4	Jun (rising)
43	Baltimore Checkerspot	Euphydryas phaeton	Brush-footed Butterflies	4	Jun (rising)
44	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	4	Jul (rising)
45	Northern Cloudywing	Cecropterus pylades	Skippers	4	Jun (rising)
46	Northern Crescent	Phyciodes cocyta	Brush-footed Butterflies	3	Jul (rising)
47	Essex Skipper	Thymelicus lineola	Skippers	2	Jun (rising)
48	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	2	Sep (rising)
49	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	2	Sep (rising)
50	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	2	Aug (rising)