60 butterflies were recorded flying in Connecticut in June in our iNaturalist sample; 12 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top butterflies in June

Small White

Great Spangled Fritillary

Silver-spotted Skipper

Monarch

Little Wood Satyr

Spicebush Swallowtail

Zabulon Skipper

Peck's Skipper

Banded Hairstreak

American Lady

Red-spotted Admiral

Eastern Tiger Swallowtail
All butterflies flying in Connecticut in June
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 259 | Jul (rising) |
| 2 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 249 | Jul (rising) |
| 3 | Silver-spotted Skipper | Epargyreus clarus | Skippers | 229 | Jul (rising) |
| 4 | Monarch | Danaus plexippus | Brush-footed Butterflies | 220 | Aug (rising) |
| 5 | Little Wood Satyr | Megisto cymela | Brush-footed Butterflies | 192 | Jun (peak) |
| 6 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 158 | Aug (rising) |
| 7 | Zabulon Skipper | Lon zabulon | Skippers | 157 | Aug (rising) |
| 8 | Peck's Skipper | Polites peckius | Skippers | 154 | Aug (rising) |
| 9 | Banded Hairstreak | Satyrium calanus | Gossamer-winged Butterflies | 137 | Jun (peak) |
| 10 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 132 | Aug (rising) |
| 11 | Red-spotted Admiral | Limenitis arthemis | Brush-footed Butterflies | 119 | Jul (rising) |
| 12 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 112 | Aug (rising) |
| 13 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 103 | Apr (past peak) |
| 14 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 101 | Jul (rising) |
| 15 | Least Skipper | Ancyloxypha numitor | Skippers | 89 | Aug (rising) |
| 16 | Essex Skipper | Thymelicus lineola | Skippers | 78 | Jun (peak) |
| 17 | Hobomok Skipper | Lon hobomok | Skippers | 70 | Jun (peak) |
| 18 | Little Glassywing | Vernia verna | Skippers | 70 | Jul (rising) |
| 19 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 67 | Jul (rising) |
| 20 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 62 | Jul (rising) |
| 21 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 60 | Aug (rising) |
| 22 | Baltimore Checkerspot | Euphydryas phaeton | Brush-footed Butterflies | 53 | Jun (peak) |
| 23 | American Copper | Lycaena hypophlaeas | Gossamer-winged Butterflies | 51 | Aug (rising) |
| 24 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 48 | Aug (rising) |
| 25 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 47 | Aug (rising) |
| 26 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 44 | Sep (rising) |
| 27 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 43 | Aug (rising) |
| 28 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 41 | Jul (rising) |
| 29 | Common Ringlet | Coenonympha california | Brush-footed Butterflies | 37 | Jun (peak) |
| 30 | Appalachian Brown | Lethe appalachia | Brush-footed Butterflies | 35 | Jul (rising) |
| 31 | Tawny-edged Skipper | Polites themistocles | Skippers | 33 | Aug (rising) |
| 32 | Long Dash | Limochores mystic | Skippers | 27 | Jun (peak) |
| 33 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 26 | Sep (rising) |
| 34 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 24 | Aug (rising) |
| 35 | Eyed Brown | Lethe eurydice | Brush-footed Butterflies | 21 | Jun (peak) |
| 36 | Bronze Copper | Tharsalea hyllus | Gossamer-winged Butterflies | 21 | Jun (peak) |
| 37 | Juvenal's Duskywing | Erynnis juvenalis | Skippers | 20 | May (past peak) |
| 38 | Coral Hairstreak | Satyrium titus | Gossamer-winged Butterflies | 20 | Jul (rising) |
| 39 | Northern Pearly-eye | Lethe anthedon | Brush-footed Butterflies | 18 | Jul (rising) |
| 40 | Delaware Skipper | Anatrytone logan | Skippers | 15 | Jul (rising) |
| 41 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 13 | Sep (rising) |
| 42 | Southern Cloudywing | Cecropterus bathyllus | Skippers | 13 | Jun (peak) |
| 43 | Silvery Blue | Glaucopsyche lygdamus | Gossamer-winged Butterflies | 12 | May (past peak) |
| 44 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 12 | Sep (rising) |
| 45 | Common Wood-Nymph | Cercyonis pegala | Brush-footed Butterflies | 12 | Jul (rising) |
| 46 | Hoary Edge | Cecropterus lyciades | Skippers | 12 | Jun (peak) |
| 47 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 11 | Aug (rising) |
| 48 | Northern Cloudywing | Cecropterus pylades | Skippers | 10 | Jun (peak) |
| 49 | Huron Skipper | Atalopedes huron | Skippers | 9 | Sep (rising) |
| 50 | Wild Indigo Duskywing | Erynnis baptisiae | Skippers | 8 | Jul (rising) |