60 butterflies were recorded flying in Texas in October in our iNaturalist sample; 28 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

Queen

Fiery Skipper

Gray Hairstreak

Common Buckeye

Pipevine Swallowtail

American Snout

Clouded Skipper

Tawny Emperor

Variegated Fritillary
Bordered Patch
All butterflies flying in Texas in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Monarch | Danaus plexippus | Brush-footed Butterflies | 18,580 | Oct (peak) |
| 2 | Gulf Fritillary | Dione vanillae | Brush-footed Butterflies | 14,310 | Oct (peak) |
| 3 | Queen | Danaus gilippus | Brush-footed Butterflies | 9,956 | Oct (peak) |
| 4 | Fiery Skipper | Hylephila phyleus | Skippers | 6,737 | Oct (peak) |
| 5 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 5,531 | Apr (past peak) |
| 6 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 4,859 | Apr (past peak) |
| 7 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 4,492 | Apr (past peak) |
| 8 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 4,276 | Oct (peak) |
| 9 | Clouded Skipper | Lerema accius | Skippers | 3,862 | Oct (peak) |
| 10 | Tawny Emperor | Asterocampa clyton | Brush-footed Butterflies | 3,652 | Oct (peak) |
| 11 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 3,415 | Apr (past peak) |
| 12 | Bordered Patch | Chlosyne lacinia | Brush-footed Butterflies | 3,198 | Jul (past peak) |
| 13 | Huron Skipper | Atalopedes huron | Skippers | 3,192 | Oct (peak) |
| 14 | Little Yellow | Eurema lisa | Whites, Yellows, and Sulphurs | 2,915 | Oct (peak) |
| 15 | Cloudless Sulphur | Phoebis sennae | Whites, Yellows, and Sulphurs | 2,835 | Oct (peak) |
| 16 | Ceraunus Blue | Hemiargus ceraunus | Gossamer-winged Butterflies | 2,727 | Oct (peak) |
| 17 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 2,689 | Oct (peak) |
| 18 | Phaon Crescent | Phyciodes phaon | Brush-footed Butterflies | 2,604 | Oct (peak) |
| 19 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 2,602 | Apr (past peak) |
| 20 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 2,597 | May (past peak) |
| 21 | Sleepy Orange | Eurema nicippe | Whites, Yellows, and Sulphurs | 2,422 | Oct (peak) |
| 22 | Dainty Sulphur | Nathalis iole | Whites, Yellows, and Sulphurs | 2,240 | Apr (past peak) |
| 23 | Southern Dogface | Zerene cesonia | Whites, Yellows, and Sulphurs | 2,000 | Oct (peak) |
| 24 | Long-tailed Skipper | Urbanus proteus | Skippers | 1,963 | Oct (peak) |
| 25 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 1,952 | Apr (past peak) |
| 26 | Common Mestra | Mestra amymone | Brush-footed Butterflies | 1,617 | Oct (peak) |
| 27 | White-striped Longtail | Chioides albofasciatus | Skippers | 1,576 | Oct (peak) |
| 28 | Eufala Skipper | Lerodea eufala | Skippers | 1,528 | Oct (peak) |
| 29 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 1,417 | Apr (past peak) |
| 30 | Mallow Scrub-Hairstreak | Strymon istapa | Gossamer-winged Butterflies | 1,256 | Nov (rising) |
| 31 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 1,195 | Apr (past peak) |
| 32 | Large Orange Sulphur | Phoebis agarithe | Whites, Yellows, and Sulphurs | 1,180 | Oct (peak) |
| 33 | Western Giant Swallowtail | Heraclides rumiko | Swallowtails and Parnassians | 1,131 | Oct (peak) |
| 34 | White Peacock | Anartia jatrophae | Brush-footed Butterflies | 1,095 | Nov (rising) |
| 35 | Tropical Checkered-Skipper | Burnsius oileus | Skippers | 981 | Oct (peak) |
| 36 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 973 | Apr (past peak) |
| 37 | Great Purple Hairstreak | Atlides halesus | Gossamer-winged Butterflies | 944 | Oct (peak) |
| 38 | Ocola Skipper | Panoquina ocola | Skippers | 932 | Oct (peak) |
| 39 | Sickle-winged Skipper | Eantis tamenund | Skippers | 905 | Nov (rising) |
| 40 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 862 | May (past peak) |
| 41 | Western Pygmy-Blue | Brephidium exilis | Gossamer-winged Butterflies | 799 | Oct (peak) |
| 42 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 790 | Oct (peak) |
| 43 | Fatal Metalmark | Calephelis nemesis | Metalmark Butterflies | 753 | Oct (peak) |
| 44 | Lyside Sulphur | Kricogonia lyside | Whites, Yellows, and Sulphurs | 743 | Apr (past peak) |
| 45 | Goatweed Leafwing | Anaea andria | Brush-footed Butterflies | 704 | Mar (past peak) |
| 46 | Dusky-blue Groundstreak | Calycopis isobeon | Gossamer-winged Butterflies | 677 | Oct (peak) |
| 47 | Vesta Crescent | Phyciodes graphica | Brush-footed Butterflies | 633 | Apr (past peak) |
| 48 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 625 | Sep (past peak) |
| 49 | Reakirt's Blue | Echinargus isola | Gossamer-winged Butterflies | 590 | Apr (past peak) |
| 50 | Dun Skipper | Euphyes vestris | Skippers | 574 | Apr (past peak) |