Butterflies Flying in New Hampshire in September (57 Species)

57 butterflies were recorded flying in New Hampshire in September in our iNaturalist sample; 5 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

Monarch1,333 obs.

Great Spangled Fritillary305 obs.

American Lady261 obs.

American Copper249 obs.

Small White248 obs.

Clouded Sulphur200 obs.

Eastern Tailed-Blue161 obs.

Common Ringlet127 obs.

Zabulon Skipper111 obs.

Peck's Skipper86 obs.

Mourning Cloak79 obs.

Gray Hairstreak59 obs.

All butterflies flying in New Hampshire in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Monarch	Danaus plexippus	Brush-footed Butterflies	1,333	Aug (past peak)
2	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	305	Jul (past peak)
3	American Lady	Vanessa virginiensis	Brush-footed Butterflies	261	Jul (past peak)
4	American Copper	Lycaena hypophlaeas	Gossamer-winged Butterflies	249	Jul (past peak)
5	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	248	Aug (past peak)
6	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	200	Jul (past peak)
7	Eastern Tailed-Blue	Everes comyntas	Gossamer-winged Butterflies	161	Aug (past peak)
8	Common Ringlet	Coenonympha california	Brush-footed Butterflies	127	Jun (past peak)
9	Zabulon Skipper	Lon zabulon	Skippers	111	Aug (past peak)
10	Peck's Skipper	Polites peckius	Skippers	86	Aug (past peak)
11	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	79	Apr (past peak)
12	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	59	Jul (past peak)
13	Painted Lady	Vanessa cardui	Brush-footed Butterflies	54	Aug (past peak)
14	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	53	Sep (peak)
15	American Silver-bordered Fritillary	Boloria myrina	Brush-footed Butterflies	53	Aug (past peak)
16	Viceroy	Limenitis archippus	Brush-footed Butterflies	52	Jun (past peak)
17	Common Wood-Nymph	Cercyonis pegala	Brush-footed Butterflies	51	Jul (past peak)
18	Red Admiral	Vanessa atalanta	Brush-footed Butterflies	45	May (past peak)
19	Wild Indigo Duskywing	Erynnis baptisiae	Skippers	36	Jul (past peak)
20	Question Mark	Polygonia interrogationis	Brush-footed Butterflies	34	Aug (past peak)
21	Green Comma	Polygonia faunus	Brush-footed Butterflies	32	Aug (past peak)
22	Least Skipper	Ancyloxypha numitor	Skippers	28	Aug (past peak)
23	Eastern Comma	Polygonia comma	Brush-footed Butterflies	27	Jul (past peak)
24	Aphrodite Fritillary	Argynnis aphrodite	Brush-footed Butterflies	23	Jul (past peak)
25	Fiery Skipper	Hylephila phyleus	Skippers	21	Sep (peak)
26	Spicebush Swallowtail	Papilio troilus	Swallowtails and Parnassians	21	Jul (past peak)
27	Pearl Crescent	Phyciodes tharos	Brush-footed Butterflies	19	Jul (past peak)
28	Ocola Skipper	Panoquina ocola	Skippers	17	Sep (peak)
29	Tawny-edged Skipper	Polites themistocles	Skippers	16	Jun (past peak)
30	Red-spotted Admiral	Limenitis arthemis	Brush-footed Butterflies	15	Jun (past peak)
31	Atlantis Fritillary	Argynnis atlantis	Brush-footed Butterflies	15	Jul (past peak)
32	Milbert's Tortoiseshell	Aglais milberti	Brush-footed Butterflies	13	Aug (past peak)
33	Long Dash	Limochores mystic	Skippers	13	Jun (past peak)
34	Common Buckeye	Junonia coenia	Brush-footed Butterflies	12	Aug (past peak)
35	Eastern Tiger Swallowtail	Papilio glaucus	Swallowtails and Parnassians	12	Aug (past peak)
36	Eastern Giant Swallowtail	Heraclides cresphontes	Swallowtails and Parnassians	12	Aug (past peak)
37	Pipevine Swallowtail	Battus philenor	Swallowtails and Parnassians	11	Sep (peak)
38	Huron Skipper	Atalopedes huron	Skippers	10	Sep (peak)
39	Silver-spotted Skipper	Epargyreus clarus	Skippers	9	Jul (past peak)
40	Canadian Tiger Swallowtail	Papilio canadensis	Swallowtails and Parnassians	8	Jun (past peak)
41	Red-banded Hairstreak	Calycopis cecrops	Gossamer-winged Butterflies	8	Aug (past peak)
42	White M Hairstreak	Parrhasius m-album	Gossamer-winged Butterflies	8	Aug (past peak)
43	Appalachian Brown	Lethe appalachia	Brush-footed Butterflies	8	Jul (past peak)
44	Gray Comma	Polygonia progne	Brush-footed Butterflies	7	Jul (past peak)
45	Harvester	Feniseca tarquinius	Gossamer-winged Butterflies	7	Jun (past peak)
46	Northern Crescent	Phyciodes cocyta	Brush-footed Butterflies	4	Jun (past peak)
47	Black Swallowtail	Papilio polyxenes	Swallowtails and Parnassians	3	Jul (past peak)
48	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	3	Jul (past peak)
49	Horace's Duskywing	Erynnis horatius	Skippers	2	Jul (past peak)
50	Common Sootywing	Pholisora catullus	Skippers	2	Jul (past peak)