60 butterflies were recorded flying in Vermont in August in our iNaturalist sample; 13 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top butterflies in August

Monarch

Viceroy

Eastern Giant Swallowtail
Common Ringlet

Small White

Great Spangled Fritillary
Common Wood-Nymph

Peck's Skipper

Eastern Tailed-Blue

Least Skipper
Clouded Sulphur

Red Admiral
All butterflies flying in Vermont in August
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Monarch | Danaus plexippus | Brush-footed Butterflies | 3,034 | Aug (peak) |
| 2 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 594 | Aug (peak) |
| 3 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 535 | Aug (peak) |
| 4 | Common Ringlet | Coenonympha california | Brush-footed Butterflies | 508 | Jun (past peak) |
| 5 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 483 | Aug (peak) |
| 6 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 461 | Jul (past peak) |
| 7 | Common Wood-Nymph | Cercyonis pegala | Brush-footed Butterflies | 419 | Jul (past peak) |
| 8 | Peck's Skipper | Polites peckius | Skippers | 362 | Aug (peak) |
| 9 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 360 | Aug (peak) |
| 10 | Least Skipper | Ancyloxypha numitor | Skippers | 286 | Aug (peak) |
| 11 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 257 | Sep (rising) |
| 12 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 201 | Jul (past peak) |
| 13 | Red-spotted Admiral | Limenitis arthemis | Brush-footed Butterflies | 201 | Jun (past peak) |
| 14 | Silver-spotted Skipper | Epargyreus clarus | Skippers | 199 | Jul (past peak) |
| 15 | Atlantis Fritillary | Argynnis atlantis | Brush-footed Butterflies | 189 | Jul (past peak) |
| 16 | Northern Pearly-eye | Lethe anthedon | Brush-footed Butterflies | 173 | Jul (past peak) |
| 17 | American Silver-bordered Fritillary | Boloria myrina | Brush-footed Butterflies | 149 | Jun (past peak) |
| 18 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 140 | Apr (past peak) |
| 19 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 125 | Jul (past peak) |
| 20 | American Copper | Lycaena hypophlaeas | Gossamer-winged Butterflies | 125 | Jun (past peak) |
| 21 | Wild Indigo Duskywing | Erynnis baptisiae | Skippers | 120 | Jul (past peak) |
| 22 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 103 | Jul (past peak) |
| 23 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 93 | Jul (past peak) |
| 24 | Tawny-edged Skipper | Polites themistocles | Skippers | 85 | Jun (past peak) |
| 25 | Meadow Fritillary | Boloria bellona | Brush-footed Butterflies | 84 | Aug (peak) |
| 26 | Milbert's Tortoiseshell | Aglais milberti | Brush-footed Butterflies | 82 | Jul (past peak) |
| 27 | Dun Skipper | Euphyes vestris | Skippers | 65 | Jul (past peak) |
| 28 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 64 | Sep (rising) |
| 29 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 64 | Aug (peak) |
| 30 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 61 | Jul (past peak) |
| 31 | Green Comma | Polygonia faunus | Brush-footed Butterflies | 51 | Aug (peak) |
| 32 | Aphrodite Fritillary | Argynnis aphrodite | Brush-footed Butterflies | 41 | Jul (past peak) |
| 33 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 40 | Jul (past peak) |
| 34 | Bronze Copper | Tharsalea hyllus | Gossamer-winged Butterflies | 35 | Jun (past peak) |
| 35 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 26 | Jun (past peak) |
| 36 | Northern Crescent | Phyciodes cocyta | Brush-footed Butterflies | 25 | Jun (past peak) |
| 37 | Gray Comma | Polygonia progne | Brush-footed Butterflies | 22 | Jul (past peak) |
| 38 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 20 | Aug (peak) |
| 39 | Banded Hairstreak | Satyrium calanus | Gossamer-winged Butterflies | 19 | Jul (past peak) |
| 40 | Appalachian Brown | Lethe appalachia | Brush-footed Butterflies | 19 | Jul (past peak) |
| 41 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 17 | Jul (past peak) |
| 42 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 17 | Jul (past peak) |
| 43 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 16 | Aug (peak) |
| 44 | Harvester | Feniseca tarquinius | Gossamer-winged Butterflies | 16 | Jun (past peak) |
| 45 | Broad-winged Skipper | Poanes viator | Skippers | 13 | Jul (past peak) |
| 46 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 12 | Aug (peak) |
| 47 | Tawny Emperor | Asterocampa clyton | Brush-footed Butterflies | 11 | Jul (past peak) |
| 48 | Northern Broken-Dash | Polites egeremet | Skippers | 11 | Jul (past peak) |
| 49 | Baltimore Checkerspot | Euphydryas phaeton | Brush-footed Butterflies | 10 | Jul (past peak) |
| 50 | Canadian Tiger Swallowtail | Papilio canadensis | Swallowtails and Parnassians | 9 | Jun (past peak) |