36 butterflies were recorded flying in Ohio in March in our iNaturalist sample; 0 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top butterflies in March

Eastern Comma
Mourning Cloak

Spring Azure

Small White

Red Admiral

Falcate Orangetip

Zebra Swallowtail

Eastern Tiger Swallowtail

Henry's Elfin

Question Mark

Summer Azure

Sleepy Duskywing
All butterflies flying in Ohio in March
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Eastern Comma | Polygonia comma | Brush-footed Butterflies | 400 | Aug (rising) |
| 2 | Mourning Cloak | Nymphalis antiopa | Brush-footed Butterflies | 231 | Apr (rising) |
| 3 | Spring Azure | Celastrina ladon | Gossamer-winged Butterflies | 119 | Apr (rising) |
| 4 | Small White | Pieris rapae | Whites, Yellows, and Sulphurs | 73 | Sep (rising) |
| 5 | Red Admiral | Vanessa atalanta | Brush-footed Butterflies | 58 | Jul (rising) |
| 6 | Falcate Orangetip | Anthocharis midea | Whites, Yellows, and Sulphurs | 30 | Apr (rising) |
| 7 | Zebra Swallowtail | Eurytides marcellus | Swallowtails and Parnassians | 25 | Jul (rising) |
| 8 | Eastern Tiger Swallowtail | Papilio glaucus | Swallowtails and Parnassians | 24 | Aug (rising) |
| 9 | Henry's Elfin | Callophrys henrici | Gossamer-winged Butterflies | 23 | Apr (rising) |
| 10 | Question Mark | Polygonia interrogationis | Brush-footed Butterflies | 9 | Jul (rising) |
| 11 | Summer Azure | Celastrina neglecta | Gossamer-winged Butterflies | 8 | Jul (rising) |
| 12 | Sleepy Duskywing | Erynnis brizo | Skippers | 6 | Apr (rising) |
| 13 | Juvenal's Duskywing | Erynnis juvenalis | Skippers | 6 | Apr (rising) |
| 14 | Clouded Sulphur | Colias philodice | Whites, Yellows, and Sulphurs | 6 | Sep (rising) |
| 15 | Black Swallowtail | Papilio polyxenes | Swallowtails and Parnassians | 5 | Aug (rising) |
| 16 | Milbert's Tortoiseshell | Aglais milberti | Brush-footed Butterflies | 5 | Sep (rising) |
| 17 | Painted Lady | Vanessa cardui | Brush-footed Butterflies | 4 | Sep (rising) |
| 18 | Spicebush Swallowtail | Papilio troilus | Swallowtails and Parnassians | 4 | Jul (rising) |
| 19 | Juniper Hairstreak | Callophrys gryneus | Gossamer-winged Butterflies | 4 | Jul (rising) |
| 20 | American Lady | Vanessa virginiensis | Brush-footed Butterflies | 3 | May (rising) |
| 21 | Gray Hairstreak | Strymon melinus | Gossamer-winged Butterflies | 3 | Aug (rising) |
| 22 | Orange Sulphur | Colias eurytheme | Whites, Yellows, and Sulphurs | 3 | Sep (rising) |
| 23 | Brown Elfin | Callophrys augustinus | Gossamer-winged Butterflies | 3 | Apr (rising) |
| 24 | Checkered White | Pontia protodice | Whites, Yellows, and Sulphurs | 3 | Sep (rising) |
| 25 | Monarch | Danaus plexippus | Brush-footed Butterflies | 2 | Aug (rising) |
| 26 | American Snout | Libytheana carinenta | Brush-footed Butterflies | 2 | Jul (rising) |
| 27 | Meadow Fritillary | Boloria bellona | Brush-footed Butterflies | 2 | Sep (rising) |
| 28 | Common Buckeye | Junonia coenia | Brush-footed Butterflies | 1 | Sep (rising) |
| 29 | Pipevine Swallowtail | Battus philenor | Swallowtails and Parnassians | 1 | Jul (rising) |
| 30 | Silvery Blue | Glaucopsyche lygdamus | Gossamer-winged Butterflies | 1 | Apr (rising) |
| 31 | Eastern Pine Elfin | Callophrys niphon | Gossamer-winged Butterflies | 1 | Apr (rising) |
| 32 | Baltimore Checkerspot | Euphydryas phaeton | Brush-footed Butterflies | 1 | Jun (rising) |
| 33 | Viceroy | Limenitis archippus | Brush-footed Butterflies | 1 | Sep (rising) |
| 34 | Hackberry Emperor | Asterocampa celtis | Brush-footed Butterflies | 1 | Aug (rising) |
| 35 | White M Hairstreak | Parrhasius m-album | Gossamer-winged Butterflies | 1 | Apr (rising) |
| 36 | Great Spangled Fritillary | Argynnis cybele | Brush-footed Butterflies | 1 | Jun (rising) |