60 butterflies were recorded flying in Tennessee in May in our iNaturalist sample; 3 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 Tiger Swallowtail

Pipevine Swallowtail
Hackberry Emperor

Silver-spotted Skipper

Monarch

Zabulon Skipper

Spicebush Swallowtail

Silvery Checkerspot

Little Wood Satyr

Zebra Swallowtail

Eastern Tailed-Blue
All butterflies flying in Tennessee in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 911 | May (peak) |
| 2 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 598 | Aug (rising) |
| 3 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 589 | Jul (rising) |
| 4 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 434 | Aug (rising) |
| 5 | Silver-spotted Skipper | Epargyreus clarus | Skippers | 370 | Jul (rising) |
| 6 | Monarch | Danaus plexippus | Brush-footed Butterflies | 333 | Sep (rising) |
| 7 | Zabulon Skipper | Lon zabulon | Skippers | 327 | Aug (rising) |
| 8 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 324 | Jul (rising) |
| 9 | Silvery Checkerspot | Chlosyne nycteis | Brush-footed Butterflies | 316 | Jul (rising) |
| 10 | Little Wood Satyr | Megisto cymela | Brush-footed Butterflies | 275 | May (peak) |
| 11 | Zebra Swallowtail | Eurytides marcellus | Swallowtails and Parnassians | 253 | Apr (past peak) |
| 12 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 232 | Sep (rising) |
| 13 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 228 | Aug (rising) |
| 14 | Carolina Satyr | Hermeuptychia sosybius | Brush-footed Butterflies | 207 | Apr (past peak) |
| 15 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 200 | Jul (rising) |
| 16 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 160 | Sep (rising) |
| 17 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 154 | Jun (rising) |
| 18 | Northern Pearly-eye | Lethe anthedon | Brush-footed Butterflies | 146 | Aug (rising) |
| 19 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 135 | Jun (rising) |
| 20 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 109 | Sep (rising) |
| 21 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 101 | Jul (rising) |
| 22 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 100 | Mar (past peak) |
| 23 | Huron Skipper | Atalopedes huron | Skippers | 86 | Aug (rising) |
| 24 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 84 | Sep (rising) |
| 25 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 79 | Sep (rising) |
| 26 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 77 | Jul (rising) |
| 27 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 75 | Aug (rising) |
| 28 | Tawny Emperor | Asterocampa clyton | Brush-footed Butterflies | 69 | Aug (rising) |
| 29 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 53 | Mar (past peak) |
| 30 | Red-spotted Admiral | Limenitis arthemis | Brush-footed Butterflies | 52 | Aug (rising) |
| 31 | Juniper Hairstreak | Callophrys gryneus | Gossamer-winged Butterflies | 50 | Apr (past peak) |
| 32 | Least Skipper | Ancyloxypha numitor | Skippers | 48 | Aug (rising) |
| 33 | Hoary Edge | Cecropterus lyciades | Skippers | 42 | Jul (rising) |
| 34 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 37 | Aug (rising) |
| 35 | Banded Hairstreak | Satyrium calanus | Gossamer-winged Butterflies | 35 | Jun (rising) |
| 36 | Juvenal's Duskywing | Erynnis juvenalis | Skippers | 34 | Apr (past peak) |
| 37 | Dun Skipper | Euphyes vestris | Skippers | 34 | Aug (rising) |
| 38 | Appalachian Brown | Lethe appalachia | Brush-footed Butterflies | 29 | Aug (rising) |
| 39 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 26 | Sep (rising) |
| 40 | Little Glassywing | Vernia verna | Skippers | 25 | Aug (rising) |
| 41 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 24 | Aug (rising) |
| 42 | Harvester | Feniseca tarquinius | Gossamer-winged Butterflies | 23 | Apr (past peak) |
| 43 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 20 | Aug (rising) |
| 44 | Northern Cloudywing | Cecropterus pylades | Skippers | 20 | May (peak) |
| 45 | Clouded Skipper | Lerema accius | Skippers | 19 | Sep (rising) |
| 46 | Goatweed Leafwing | Anaea andria | Brush-footed Butterflies | 17 | Apr (past peak) |
| 47 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 14 | Oct (rising) |
| 48 | Gulf Fritillary | Dione vanillae | Brush-footed Butterflies | 14 | Sep (rising) |
| 49 | Fiery Skipper | Hylephila phyleus | Skippers | 14 | Oct (rising) |
| 50 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 14 | Jul (rising) |