58 birds were recorded seen in Hawaii 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 birds in May

Red-crested Cardinal
Common Myna

Zebra Dove

Western Cattle-Egret

Black-crowned Night Heron

Saffron Finch
Hawaiian Goose

House Sparrow

White-rumped Shama

Spotted Dove
Warbling White-eye
Red-vented Bulbul
All birds seen in Hawaii in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Red-crested Cardinal | Paroaria coronata | Tanagers and Allies | 981 | Jun (rising) |
| 2 | Common Myna | Acridotheres tristis | Starlings | 803 | Mar (past peak) |
| 3 | Zebra Dove | Geopelia striata | Pigeons and Doves | 764 | Dec (rising) |
| 4 | Western Cattle-Egret | Ardea ibis | Herons, Egrets, and Bitterns | 584 | Dec (rising) |
| 5 | Black-crowned Night Heron | Nycticorax nycticorax | Herons, Egrets, and Bitterns | 552 | Mar (past peak) |
| 6 | Saffron Finch | Sicalis flaveola | Tanagers and Allies | 458 | Jan (past peak) |
| 7 | Hawaiian Goose | Branta sandvicensis | Ducks, Geese, and Swans | 408 | Dec (rising) |
| 8 | House Sparrow | Passer domesticus | Old World Sparrows | 390 | Aug (rising) |
| 9 | White-rumped Shama | Copsychus malabaricus | Old World Flycatchers, Robins, and Chats | 351 | May (peak) |
| 10 | Spotted Dove | Spilopelia chinensis | Pigeons and Doves | 347 | Mar (past peak) |
| 11 | Warbling White-eye | Zosterops japonicus | White-eyes, Yuhinas, and Allies | 321 | Mar (past peak) |
| 12 | Red-vented Bulbul | Pycnonotus cafer | Bulbuls | 263 | Apr (past peak) |
| 13 | ʻApapane | Himatione sanguinea | Finches, Euphonias, and Allies | 262 | Mar (past peak) |
| 14 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 258 | Mar (past peak) |
| 15 | Yellow-billed Cardinal | Paroaria capitata | Tanagers and Allies | 245 | Jul (rising) |
| 16 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 239 | Apr (past peak) |
| 17 | Common Waxbill | Estrilda astrild | Waxbills and Allies | 233 | Jan (past peak) |
| 18 | Java Sparrow | Padda oryzivora | Waxbills and Allies | 231 | Dec (rising) |
| 19 | Laysan Albatross | Phoebastria immutabilis | Albatrosses | 219 | Dec (rising) |
| 20 | Red-footed Booby | Sula sula | Boobies and Gannets | 204 | Dec (rising) |
| 21 | Wandering Tattler | Tringa incana | Sandpipers and Allies | 113 | Jan (past peak) |
| 22 | Chukar | Alectoris chukar | Pheasants, Grouse, and Allies | 77 | Sep (rising) |
| 23 | Scaly-breasted Munia | Lonchura punctulata | Waxbills and Allies | 73 | Feb (past peak) |
| 24 | Red-whiskered Bulbul | Pycnonotus jocosus | Bulbuls | 73 | Mar (past peak) |
| 25 | Indian Peafowl | Pavo cristatus | Pheasants, Grouse, and Allies | 64 | Mar (past peak) |
| 26 | Pacific Golden-Plover | Pluvialis fulva | Plovers and Lapwings | 59 | Mar (past peak) |
| 27 | Rosy-faced Lovebird | Agapornis roseicollis | Old World Parrots | 46 | Jan (past peak) |
| 28 | Ruddy Turnstone | Arenaria interpres | Sandpipers and Allies | 43 | Jan (past peak) |
| 29 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 31 | Mar (past peak) |
| 30 | Ring-necked Pheasant | Phasianus colchicus | Pheasants, Grouse, and Allies | 25 | Mar (past peak) |
| 31 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 25 | Dec (rising) |
| 32 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 20 | Mar (past peak) |
| 33 | American Barn Owl | Tyto furcata | Barn Owls | 14 | May (peak) |
| 34 | Red-masked Parakeet | Psittacara erythrogenys | New World and African Parrots | 10 | Jan (past peak) |
| 35 | California Quail | Callipepla californica | New World Quails | 8 | Mar (past peak) |
| 36 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 8 | Dec (rising) |
| 37 | Common Gallinule | Gallinula galeata | Rails, Gallinules, and Coots | 7 | Jun (rising) |
| 38 | Laughing Gull | Leucophaeus atricilla | Gulls, Terns, and Skimmers | 7 | Jan (past peak) |
| 39 | Black Tern | Chlidonias niger | Gulls, Terns, and Skimmers | 6 | May (peak) |
| 40 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 5 | Nov (rising) |
| 41 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 4 | Mar (past peak) |
| 42 | Sanderling | Calidris alba | Sandpipers and Allies | 4 | Dec (rising) |
| 43 | Black-necked Stilt | Himantopus mexicanus | Stilts and Avocets | 4 | Mar (past peak) |
| 44 | White-faced Ibis | Plegadis chihi | Ibises and Spoonbills | 3 | Jan (past peak) |
| 45 | Magnificent Frigatebird | Fregata magnificens | Frigatebirds | 3 | May (peak) |
| 46 | Western Meadowlark | Sturnella neglecta | New World Blackbirds and Orioles | 3 | Dec (rising) |
| 47 | Red-crowned Amazon | Amazona viridigenalis | New World and African Parrots | 3 | Jan (past peak) |
| 48 | Least Tern | Sternula antillarum | Gulls, Terns, and Skimmers | 3 | Sep (rising) |
| 49 | Osprey | Pandion haliaetus | Ospreys | 2 | Oct (rising) |
| 50 | Wilson's Phalarope | Phalaropus tricolor | Sandpipers and Allies | 2 | May (peak) |