60 butterflies were recorded flying in Kansas in May in our iNaturalist sample; 2 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top butterflies in May

Great Spangled Fritillary

Eastern Tailed-Blue

Red Admiral

Variegated Fritillary

Monarch

Silver-spotted Skipper

Common Buckeye

American Lady

Question Mark

Eastern Tiger Swallowtail

Gray Hairstreak

Painted Lady
All butterflies flying in Kansas in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 155 | Jun (rising) |
| 2 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 153 | Jun (rising) |
| 3 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 151 | Apr (past peak) |
| 4 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 146 | Jun (rising) |
| 5 | Monarch | Danaus plexippus | Brush-footed Butterflies | 129 | Sep (rising) |
| 6 | Silver-spotted Skipper | Epargyreus clarus | Skippers | 101 | Sep (rising) |
| 7 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 97 | Sep (rising) |
| 8 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 74 | Apr (past peak) |
| 9 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 73 | Jun (rising) |
| 10 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 73 | Aug (rising) |
| 11 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 71 | Sep (rising) |
| 12 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 64 | Sep (rising) |
| 13 | Zabulon Skipper | Lon zabulon | Skippers | 57 | Jul (rising) |
| 14 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 54 | Sep (rising) |
| 15 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 51 | Aug (rising) |
| 16 | Zebra Swallowtail | Eurytides marcellus | Swallowtails and Parnassians | 48 | Jun (rising) |
| 17 | Common Sootywing | Pholisora catullus | Skippers | 46 | Aug (rising) |
| 18 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 45 | Oct (rising) |
| 19 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 43 | Jun (rising) |
| 20 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 42 | Sep (rising) |
| 21 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 38 | Jun (rising) |
| 22 | Common Checkered-Skipper | Burnsius communis | Skippers | 37 | Oct (rising) |
| 23 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 35 | Sep (rising) |
| 24 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 30 | May (peak) |
| 25 | Silvery Checkerspot | Chlosyne nycteis | Brush-footed Butterflies | 30 | Jul (rising) |
| 26 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 28 | Jul (rising) |
| 27 | Gorgone Checkerspot | Chlosyne gorgone | Brush-footed Butterflies | 23 | Jul (rising) |
| 28 | Little Wood Satyr | Megisto cymela | Brush-footed Butterflies | 22 | Jun (rising) |
| 29 | Reakirt's Blue | Echinargus isola | Gossamer-winged Butterflies | 22 | Jun (rising) |
| 30 | Huron Skipper | Atalopedes huron | Skippers | 22 | Aug (rising) |
| 31 | Least Skipper | Ancyloxypha numitor | Skippers | 19 | May (peak) |
| 32 | Dainty Sulphur | Nathalis iole | Whites, Yellows, and Sulphurs | 18 | Sep (rising) |
| 33 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 17 | Jul (rising) |
| 34 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 14 | Sep (rising) |
| 35 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 13 | Aug (rising) |
| 36 | Juniper Hairstreak | Callophrys gryneus | Gossamer-winged Butterflies | 13 | Jul (rising) |
| 37 | Goatweed Leafwing | Anaea andria | Brush-footed Butterflies | 12 | Apr (past peak) |
| 38 | Tawny-edged Skipper | Polites themistocles | Skippers | 11 | Aug (rising) |
| 39 | Sleepy Orange | Eurema nicippe | Whites, Yellows, and Sulphurs | 10 | Aug (rising) |
| 40 | Red-spotted Admiral | Limenitis arthemis | Brush-footed Butterflies | 8 | Aug (rising) |
| 41 | Henry's Elfin | Callophrys henrici | Gossamer-winged Butterflies | 8 | Apr (past peak) |
| 42 | Peck's Skipper | Polites peckius | Skippers | 8 | Sep (rising) |
| 43 | Fiery Skipper | Hylephila phyleus | Skippers | 6 | Sep (rising) |
| 44 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 6 | Oct (rising) |
| 45 | Banded Hairstreak | Satyrium calanus | Gossamer-winged Butterflies | 6 | Jun (rising) |
| 46 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 6 | Jul (rising) |
| 47 | Gray Comma | Polygonia progne | Brush-footed Butterflies | 6 | Mar (past peak) |
| 48 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 6 | Sep (rising) |
| 49 | Melissa Blue | Plebejus melissa | Gossamer-winged Butterflies | 6 | Sep (rising) |
| 50 | Queen | Danaus gilippus | Brush-footed Butterflies | 4 | Sep (rising) |