60 butterflies were recorded flying in Oklahoma in October 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 October

Monarch

Gulf Fritillary
Huron Skipper

Pearl Crescent

Orange Sulphur

Fiery Skipper

Variegated Fritillary

Painted Lady

Dainty Sulphur

Common Buckeye

Gray Hairstreak

Pipevine Swallowtail
All butterflies flying in Oklahoma in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Monarch | Danaus plexippus | Brush-footed Butterflies | 1,468 | Sep (past peak) |
| 2 | Gulf Fritillary | Dione vanillae | Brush-footed Butterflies | 821 | Sep (past peak) |
| 3 | Huron Skipper | Atalopedes huron | Skippers | 628 | Aug (past peak) |
| 4 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 348 | Apr (past peak) |
| 5 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 336 | Oct (peak) |
| 6 | Fiery Skipper | Hylephila phyleus | Skippers | 314 | Sep (past peak) |
| 7 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 282 | May (past peak) |
| 8 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 273 | Oct (peak) |
| 9 | Dainty Sulphur | Nathalis iole | Whites, Yellows, and Sulphurs | 252 | Oct (peak) |
| 10 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 250 | Jun (past peak) |
| 11 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 250 | Sep (past peak) |
| 12 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 198 | Sep (past peak) |
| 13 | Cloudless Sulphur | Phoebis sennae | Whites, Yellows, and Sulphurs | 178 | Sep (past peak) |
| 14 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 156 | Sep (past peak) |
| 15 | Common Checkered-Skipper | Burnsius communis | Skippers | 150 | Oct (peak) |
| 16 | Bordered Patch | Chlosyne lacinia | Brush-footed Butterflies | 141 | Oct (peak) |
| 17 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 133 | Apr (past peak) |
| 18 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 132 | Sep (past peak) |
| 19 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 112 | Sep (past peak) |
| 20 | Clouded Skipper | Lerema accius | Skippers | 98 | Oct (peak) |
| 21 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 96 | Apr (past peak) |
| 22 | Goatweed Leafwing | Anaea andria | Brush-footed Butterflies | 94 | Apr (past peak) |
| 23 | Phaon Crescent | Phyciodes phaon | Brush-footed Butterflies | 92 | Oct (peak) |
| 24 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 89 | May (past peak) |
| 25 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 78 | Apr (past peak) |
| 26 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 73 | Sep (past peak) |
| 27 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 72 | Aug (past peak) |
| 28 | Queen | Danaus gilippus | Brush-footed Butterflies | 68 | Aug (past peak) |
| 29 | Eufala Skipper | Lerodea eufala | Skippers | 67 | Oct (peak) |
| 30 | Common Wood-Nymph | Cercyonis pegala | Brush-footed Butterflies | 60 | Sep (past peak) |
| 31 | Little Yellow | Eurema lisa | Whites, Yellows, and Sulphurs | 53 | Sep (past peak) |
| 32 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 48 | Sep (past peak) |
| 33 | Sleepy Orange | Eurema nicippe | Whites, Yellows, and Sulphurs | 47 | Sep (past peak) |
| 34 | Tawny Emperor | Asterocampa clyton | Brush-footed Butterflies | 37 | Sep (past peak) |
| 35 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 31 | Jun (past peak) |
| 36 | Western Pygmy-Blue | Brephidium exilis | Gossamer-winged Butterflies | 29 | Oct (peak) |
| 37 | Southern Dogface | Zerene cesonia | Whites, Yellows, and Sulphurs | 29 | Oct (peak) |
| 38 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 28 | Oct (peak) |
| 39 | Red-spotted Admiral | Limenitis arthemis | Brush-footed Butterflies | 28 | Sep (past peak) |
| 40 | Carolina Satyr | Hermeuptychia sosybius | Brush-footed Butterflies | 25 | Apr (past peak) |
| 41 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 23 | Jun (past peak) |
| 42 | Eastern Gemmed-Satyr | Cyllopsis gemma | Brush-footed Butterflies | 23 | Apr (past peak) |
| 43 | Marine Blue | Leptotes marina | Gossamer-winged Butterflies | 21 | Jul (past peak) |
| 44 | Reakirt's Blue | Echinargus isola | Gossamer-winged Butterflies | 20 | Jun (past peak) |
| 45 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 17 | May (past peak) |
| 46 | Great Purple Hairstreak | Atlides halesus | Gossamer-winged Butterflies | 17 | Sep (past peak) |
| 47 | Northern Pearly-eye | Lethe anthedon | Brush-footed Butterflies | 17 | May (past peak) |
| 48 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 16 | Aug (past peak) |
| 49 | Texan Crescent | Anthanassa texana | Brush-footed Butterflies | 16 | Oct (peak) |
| 50 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 14 | May (past peak) |