60 butterflies were recorded flying in South Carolina in May 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 May

American Lady

Common Buckeye

Eastern Tiger Swallowtail

Horace's Duskywing

Pearl Crescent

Monarch

Palamedes Swallowtail

Variegated Fritillary

Question Mark

Silver-spotted Skipper

Gray Hairstreak

Pipevine Swallowtail
All butterflies flying in South Carolina in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 308 | May (peak) |
| 2 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 259 | Sep (rising) |
| 3 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 235 | Aug (rising) |
| 4 | Horace's Duskywing | Erynnis horatius | Skippers | 210 | Aug (rising) |
| 5 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 196 | Apr (past peak) |
| 6 | Monarch | Danaus plexippus | Brush-footed Butterflies | 188 | Oct (rising) |
| 7 | Palamedes Swallowtail | Papilio palamedes | Swallowtails and Parnassians | 153 | Apr (past peak) |
| 8 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 129 | Sep (rising) |
| 9 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 120 | May (peak) |
| 10 | Silver-spotted Skipper | Epargyreus clarus | Skippers | 119 | Aug (rising) |
| 11 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 110 | Sep (rising) |
| 12 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 109 | May (peak) |
| 13 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 99 | May (peak) |
| 14 | Eastern Tailed-Blue | Everes comyntas | Gossamer-winged Butterflies | 94 | Apr (past peak) |
| 15 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 90 | May (peak) |
| 16 | Zabulon Skipper | Lon zabulon | Skippers | 87 | Apr (past peak) |
| 17 | Carolina Satyr | Hermeuptychia sosybius | Brush-footed Butterflies | 86 | Apr (past peak) |
| 18 | Zebra Swallowtail | Eurytides marcellus | Swallowtails and Parnassians | 81 | Mar (past peak) |
| 19 | Fiery Skipper | Hylephila phyleus | Skippers | 74 | Jul (rising) |
| 20 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 68 | Jul (rising) |
| 21 | Twin-spot Skipper | Oligoria maculata | Skippers | 67 | May (peak) |
| 22 | Southern Pearly-eye | Lethe portlandia | Brush-footed Butterflies | 62 | Sep (rising) |
| 23 | Little Wood Satyr | Megisto cymela | Brush-footed Butterflies | 61 | Apr (past peak) |
| 24 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 51 | Apr (past peak) |
| 25 | Whirlabout | Hedone vibex | Skippers | 50 | Sep (rising) |
| 26 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 49 | Jul (rising) |
| 27 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 48 | May (peak) |
| 28 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 40 | Aug (rising) |
| 29 | Clouded Skipper | Lerema accius | Skippers | 39 | Sep (rising) |
| 30 | Delaware Skipper | Anatrytone logan | Skippers | 36 | May (peak) |
| 31 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 34 | May (peak) |
| 32 | Sleepy Orange | Eurema nicippe | Whites, Yellows, and Sulphurs | 32 | Sep (rising) |
| 33 | Oak Hairstreak | Satyrium favonius | Gossamer-winged Butterflies | 32 | May (peak) |
| 34 | Least Skipper | Ancyloxypha numitor | Skippers | 31 | Aug (rising) |
| 35 | Gulf Fritillary | Dione vanillae | Brush-footed Butterflies | 30 | Sep (rising) |
| 36 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 26 | Sep (rising) |
| 37 | Banded Hairstreak | Satyrium calanus | Gossamer-winged Butterflies | 24 | May (peak) |
| 38 | Southern Cloudywing | Cecropterus bathyllus | Skippers | 24 | Jul (rising) |
| 39 | Broad-winged Skipper | Poanes viator | Skippers | 23 | May (peak) |
| 40 | Appalachian Brown | Lethe appalachia | Brush-footed Butterflies | 22 | Sep (rising) |
| 41 | Hoary Edge | Cecropterus lyciades | Skippers | 22 | Jul (rising) |
| 42 | Northern Cloudywing | Cecropterus pylades | Skippers | 21 | Apr (past peak) |
| 43 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 20 | Aug (rising) |
| 44 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 20 | Sep (rising) |
| 45 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 17 | Oct (rising) |
| 46 | Dun Skipper | Euphyes vestris | Skippers | 17 | Sep (rising) |
| 47 | Swarthy Skipper | Nastra lherminier | Skippers | 16 | Sep (rising) |
| 48 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 15 | May (peak) |
| 49 | Southern Broken-Dash | Polites otho | Skippers | 15 | Aug (rising) |
| 50 | Phaon Crescent | Phyciodes phaon | Brush-footed Butterflies | 12 | Aug (rising) |