60 butterflies were recorded flying in Florida in May in our iNaturalist sample; 5 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top butterflies in May

Gulf Fritillary

Monarch
White Peacock

Horace's Duskywing
Zebra Longwing

Eastern Giant Swallowtail

Fiery Skipper

Great Southern White

Common Buckeye

Eastern Tiger Swallowtail
Ceraunus Blue

Spicebush Swallowtail
All butterflies flying in Florida in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Gulf Fritillary | Dione vanillae | Brush-footed Butterflies | 2,259 | Oct (rising) |
| 2 | Monarch | Danaus plexippus | Brush-footed Butterflies | 1,659 | Apr (past peak) |
| 3 | White Peacock | Anartia jatrophae | Brush-footed Butterflies | 1,290 | Oct (rising) |
| 4 | Horace's Duskywing | Erynnis horatius | Skippers | 1,232 | Apr (past peak) |
| 5 | Zebra Longwing | Heliconius charithonia | Brush-footed Butterflies | 986 | Apr (past peak) |
| 6 | Eastern Giant Swallowtail | Heraclides cresphontes | Swallowtails and Parnassians | 779 | Sep (rising) |
| 7 | Fiery Skipper | Hylephila phyleus | Skippers | 746 | Sep (rising) |
| 8 | Great Southern White | Ascia monuste | Whites, Yellows, and Sulphurs | 687 | Apr (past peak) |
| 9 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 681 | Oct (rising) |
| 10 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 666 | Sep (rising) |
| 11 | Ceraunus Blue | Hemiargus ceraunus | Gossamer-winged Butterflies | 661 | Sep (rising) |
| 12 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 643 | Sep (rising) |
| 13 | Dainty Sulphur | Nathalis iole | Whites, Yellows, and Sulphurs | 640 | Apr (past peak) |
| 14 | Phaon Crescent | Phyciodes phaon | Brush-footed Butterflies | 623 | Apr (past peak) |
| 15 | Cassius Blue | Leptotes cassius | Gossamer-winged Butterflies | 522 | Apr (past peak) |
| 16 | Zebra Swallowtail | Eurytides marcellus | Swallowtails and Parnassians | 514 | Mar (past peak) |
| 17 | Atala | Eumaeus atala | Gossamer-winged Butterflies | 492 | Jul (rising) |
| 18 | Pearl Crescent | Phyciodes tharos | Brush-footed Butterflies | 482 | Apr (past peak) |
| 19 | Red-banded Hairstreak | Calycopis cecrops | Gossamer-winged Butterflies | 475 | May (peak) |
| 20 | Queen | Danaus gilippus | Brush-footed Butterflies | 416 | Sep (rising) |
| 21 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 393 | Jun (rising) |
| 22 | Monk Skipper | Choranthus capucinus | Skippers | 373 | Apr (past peak) |
| 23 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 359 | Sep (rising) |
| 24 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 357 | Apr (past peak) |
| 25 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 308 | May (peak) |
| 26 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 299 | May (peak) |
| 27 | Julia Heliconian | Dryas iulia | Brush-footed Butterflies | 281 | Apr (past peak) |
| 28 | Palamedes Swallowtail | Papilio palamedes | Swallowtails and Parnassians | 278 | Sep (rising) |
| 29 | Twin-spot Skipper | Oligoria maculata | Skippers | 268 | Sep (rising) |
| 30 | Whirlabout | Hedone vibex | Skippers | 258 | Apr (past peak) |
| 31 | Polydamas Swallowtail | Battus polydamas | Swallowtails and Parnassians | 250 | Jul (rising) |
| 32 | Ruddy Daggerwing | Marpesia petreus | Brush-footed Butterflies | 228 | Apr (past peak) |
| 33 | Great Purple Hairstreak | Atlides halesus | Gossamer-winged Butterflies | 213 | Apr (past peak) |
| 34 | Mallow Scrub-Hairstreak | Strymon istapa | Gossamer-winged Butterflies | 211 | May (peak) |
| 35 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 207 | Apr (past peak) |
| 36 | Variegated Fritillary | Euptoieta claudia | Brush-footed Butterflies | 198 | May (peak) |
| 37 | Orange-barred Sulphur | Phoebis philea | Whites, Yellows, and Sulphurs | 178 | Apr (past peak) |
| 38 | Southern Broken-Dash | Polites otho | Skippers | 177 | Sep (rising) |
| 39 | Tropical Checkered-Skipper | Burnsius oileus | Skippers | 164 | Sep (rising) |
| 40 | Oak Hairstreak | Satyrium favonius | Gossamer-winged Butterflies | 157 | Apr (past peak) |
| 41 | Carolina Satyr | Hermeuptychia sosybius | Brush-footed Butterflies | 155 | Mar (past peak) |
| 42 | White Checkered-Skipper | Burnsius albezens | Skippers | 135 | Jul (rising) |
| 43 | Barred Yellow | Eurema daira | Whites, Yellows, and Sulphurs | 129 | Nov (rising) |
| 44 | White M Hairstreak | Parrhasius m-album | Gossamer-winged Butterflies | 127 | Apr (past peak) |
| 45 | Little Metalmark | Calephelis virginiensis | Metalmark Butterflies | 121 | Oct (rising) |
| 46 | Cloudless Sulphur | Phoebis sennae | Whites, Yellows, and Sulphurs | 111 | Sep (rising) |
| 47 | Little Yellow | Eurema lisa | Whites, Yellows, and Sulphurs | 107 | Oct (rising) |
| 48 | Southern Skipperling | Oarisma minima | Skippers | 101 | Jul (rising) |
| 49 | Huron Skipper | Atalopedes huron | Skippers | 98 | Jul (rising) |
| 50 | Delaware Skipper | Anatrytone logan | Skippers | 97 | Sep (rising) |