Butterflies Flying in Montana in July (60 Species)

60 butterflies were recorded flying in Montana in July in our iNaturalist sample; 29 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 July

Essex Skipper322 obs.

California Tortoiseshell278 obs.

Field Crescent256 obs.

Common Wood-Nymph224 obs.

Lorquin's Admiral220 obs.

Small Wood-Nymph171 obs.

Boisduval's Blue143 obs.

Western Tiger Swallowtail116 obs.

Milbert's Tortoiseshell116 obs.

Small White115 obs.

Mormon Fritillary114 obs.

Painted Lady110 obs.

All butterflies flying in Montana in July

#	Species	Scientific name	Family	Obs.	Peak in state
1	Essex Skipper	Thymelicus lineola	Skippers	322	Jul (peak)
2	California Tortoiseshell	Nymphalis californica	Brush-footed Butterflies	278	Jul (peak)
3	Field Crescent	Phyciodes pulchella	Brush-footed Butterflies	256	Jul (peak)
4	Common Wood-Nymph	Cercyonis pegala	Brush-footed Butterflies	224	Jul (peak)
5	Lorquin's Admiral	Limenitis lorquini	Brush-footed Butterflies	220	Jul (peak)
6	Small Wood-Nymph	Cercyonis oetus	Brush-footed Butterflies	171	Jul (peak)
7	Boisduval's Blue	Icaricia icarioides	Gossamer-winged Butterflies	143	Jun (past peak)
8	Western Tiger Swallowtail	Papilio rutulus	Swallowtails and Parnassians	116	Jun (past peak)
9	Milbert's Tortoiseshell	Aglais milberti	Brush-footed Butterflies	116	Jul (peak)
10	Small White	Pieris rapae	Whites, Yellows, and Sulphurs	115	Jul (peak)
11	Mormon Fritillary	Argynnis mormonia	Brush-footed Butterflies	114	Aug (rising)
12	Painted Lady	Vanessa cardui	Brush-footed Butterflies	110	Jul (peak)
13	Two-tailed Swallowtail	Papilio multicaudata	Swallowtails and Parnassians	104	Jul (peak)
14	Rocky Mountain Parnassian	Parnassius smintheus	Swallowtails and Parnassians	104	Jul (peak)
15	Northern Crescent	Phyciodes cocyta	Brush-footed Butterflies	103	Jul (peak)
16	Anise Swallowtail	Papilio zelicaon	Swallowtails and Parnassians	96	Jul (peak)
17	Pale Swallowtail	Papilio eurymedon	Swallowtails and Parnassians	95	Jun (past peak)
18	Great Spangled Fritillary	Argynnis cybele	Brush-footed Butterflies	95	Aug (rising)
19	Mourning Cloak	Nymphalis antiopa	Brush-footed Butterflies	75	Aug (rising)
20	Northern Checkerspot	Chlosyne palla	Brush-footed Butterflies	74	Jul (peak)
21	Weidemeyer's Admiral	Limenitis weidemeyerii	Brush-footed Butterflies	74	Jul (peak)
22	Viceroy	Limenitis archippus	Brush-footed Butterflies	69	Jul (peak)
23	Blue Copper	Tharsalea heteronea	Gossamer-winged Butterflies	64	Jul (peak)
24	Margined White	Pieris marginalis	Whites, Yellows, and Sulphurs	62	Jul (peak)
25	Woodland Skipper	Ochlodes sylvanoides	Skippers	57	Aug (rising)
26	Greenish Blue	Icaricia saepiolus	Gossamer-winged Butterflies	57	Jul (peak)
27	Western White	Pontia occidentalis	Whites, Yellows, and Sulphurs	56	Aug (rising)
28	Clouded Sulphur	Colias philodice	Whites, Yellows, and Sulphurs	54	Aug (rising)
29	Pacific Fritillary	Boloria epithore	Brush-footed Butterflies	49	Jul (peak)
30	Silvery Blue	Glaucopsyche lygdamus	Gossamer-winged Butterflies	42	Jun (past peak)
31	Lupine Blue	Icaricia lupini	Gossamer-winged Butterflies	42	Jul (peak)
32	Monarch	Danaus plexippus	Brush-footed Butterflies	41	Aug (rising)
33	Hydaspe Fritillary	Argynnis hydaspe	Brush-footed Butterflies	41	Aug (rising)
34	Satyr Comma	Polygonia satyrus	Brush-footed Butterflies	40	Aug (rising)
35	Melissa Blue	Plebejus melissa	Gossamer-winged Butterflies	40	Aug (rising)
36	Common Checkered-Skipper	Burnsius communis	Skippers	39	Aug (rising)
37	Clodius Parnassian	Parnassius clodius	Swallowtails and Parnassians	38	Jul (peak)
38	Aphrodite Fritillary	Argynnis aphrodite	Brush-footed Butterflies	36	Jul (peak)
39	Common Ringlet	Coenonympha california	Brush-footed Butterflies	34	Jun (past peak)
40	Callippe Fritillary	Argynnis callippe	Brush-footed Butterflies	33	Jul (peak)
41	Gray Hairstreak	Strymon melinus	Gossamer-winged Butterflies	31	Jul (peak)
42	Hoary Comma	Polygonia gracilis	Brush-footed Butterflies	28	Aug (rising)
43	Green Comma	Polygonia faunus	Brush-footed Butterflies	28	May (past peak)
44	Western Tailed-blue	Everes amyntula	Gossamer-winged Butterflies	26	Jul (peak)
45	Snowberry Checkerspot	Euphydryas colon	Brush-footed Butterflies	25	Jun (past peak)
46	American Branded Skipper	Hesperia colorado	Skippers	24	Jul (peak)
47	Orange Sulphur	Colias eurytheme	Whites, Yellows, and Sulphurs	23	Jul (peak)
48	Variegated Fritillary	Euptoieta claudia	Brush-footed Butterflies	22	Aug (rising)
49	Edith's Checkerspot	Euphydryas editha	Brush-footed Butterflies	19	Jul (peak)
50	Mylitta Crescent	Phyciodes mylitta	Brush-footed Butterflies	18	Aug (rising)