60 birds were recorded seen in California in March in our iNaturalist sample; 1 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in March

Red-tailed Hawk
Anna's Hummingbird

Mallard

White-crowned Sparrow
House Finch
Canada Goose

Dark-eyed Junco

Western Bluebird
California Scrub-Jay
Black Phoebe

California Towhee
Lesser Goldfinch
All birds seen in California in March
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 9,082 | Jan (past peak) |
| 2 | Anna's Hummingbird | Calypte anna | Hummingbirds | 8,610 | Apr (rising) |
| 3 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 8,429 | Apr (rising) |
| 4 | White-crowned Sparrow | Zonotrichia leucophrys | New World Sparrows | 7,943 | Jan (past peak) |
| 5 | House Finch | Haemorhous mexicanus | Finches, Euphonias, and Allies | 7,356 | Apr (rising) |
| 6 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 6,168 | Apr (rising) |
| 7 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 6,045 | Apr (rising) |
| 8 | Western Bluebird | Sialia mexicana | Thrushes | 6,016 | Apr (rising) |
| 9 | California Scrub-Jay | Aphelocoma californica | Crows, Jays, and Magpies | 5,984 | Apr (rising) |
| 10 | Black Phoebe | Sayornis nigricans | Tyrant Flycatchers | 5,803 | Apr (rising) |
| 11 | California Towhee | Melozone crissalis | New World Sparrows | 5,556 | Apr (rising) |
| 12 | Lesser Goldfinch | Spinus psaltria | Finches, Euphonias, and Allies | 5,298 | Apr (rising) |
| 13 | Western Gull | Larus occidentalis | Gulls, Terns, and Skimmers | 5,279 | Aug (rising) |
| 14 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 5,271 | Jan (past peak) |
| 15 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 5,098 | Jan (past peak) |
| 16 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 5,043 | Jan (past peak) |
| 17 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 5,026 | Apr (rising) |
| 18 | Snowy Egret | Egretta thula | Herons, Egrets, and Bitterns | 4,767 | Jan (past peak) |
| 19 | Song Sparrow | Melospiza melodia | New World Sparrows | 4,760 | Apr (rising) |
| 20 | Great Egret | Ardea alba | Herons, Egrets, and Bitterns | 4,707 | Jan (past peak) |
| 21 | Turkey Vulture | Cathartes aura | New World Vultures | 4,540 | Apr (rising) |
| 22 | Wild Turkey | Meleagris gallopavo | Pheasants, Grouse, and Allies | 4,466 | Apr (rising) |
| 23 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 4,184 | Apr (rising) |
| 24 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 4,162 | Jan (past peak) |
| 25 | Common Raven | Corvus corax | Crows, Jays, and Magpies | 4,066 | Apr (rising) |
| 26 | American Crow | Corvus brachyrhynchos | Crows, Jays, and Magpies | 4,023 | Apr (rising) |
| 27 | Red-shouldered Hawk | Buteo lineatus | Hawks, Eagles, and Kites | 3,835 | Jan (past peak) |
| 28 | Black-crowned Night Heron | Nycticorax nycticorax | Herons, Egrets, and Bitterns | 3,824 | Apr (rising) |
| 29 | Acorn Woodpecker | Melanerpes formicivorus | Woodpeckers | 3,748 | Apr (rising) |
| 30 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 3,563 | Apr (rising) |
| 31 | Golden-crowned Sparrow | Zonotrichia atricapilla | New World Sparrows | 3,467 | Jan (past peak) |
| 32 | American Robin | Turdus migratorius | Thrushes | 3,323 | Apr (rising) |
| 33 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 3,196 | Jul (rising) |
| 34 | House Sparrow | Passer domesticus | Old World Sparrows | 2,782 | Apr (rising) |
| 35 | Willet | Tringa semipalmata | Sandpipers and Allies | 2,774 | Jan (past peak) |
| 36 | Bushtit | Psaltriparus minimus | Long-tailed Tits and Bushtits | 2,706 | Apr (rising) |
| 37 | Spotted Towhee | Pipilo maculatus | New World Sparrows | 2,698 | May (rising) |
| 38 | American Wigeon | Mareca americana | Ducks, Geese, and Swans | 2,621 | Jan (past peak) |
| 39 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 2,597 | Jan (past peak) |
| 40 | Brewer's Blackbird | Euphagus cyanocephalus | New World Blackbirds and Orioles | 2,521 | Apr (rising) |
| 41 | Ruddy Duck | Oxyura jamaicensis | Ducks, Geese, and Swans | 2,516 | Jan (past peak) |
| 42 | Brown Pelican | Pelecanus occidentalis | Pelicans | 2,357 | Sep (rising) |
| 43 | Allen's Hummingbird | Selasphorus sasin | Hummingbirds | 2,354 | Apr (rising) |
| 44 | Nuttall's Woodpecker | Dryobates nuttallii | Woodpeckers | 2,286 | Mar (peak) |
| 45 | Killdeer | Charadrius vociferus | Plovers and Lapwings | 2,211 | Apr (rising) |
| 46 | Great Horned Owl | Bubo virginianus | Typical Owls | 2,192 | Apr (rising) |
| 47 | California Quail | Callipepla californica | New World Quails | 2,155 | Apr (rising) |
| 48 | Northern Flicker | Colaptes auratus | Woodpeckers | 2,095 | Oct (rising) |
| 49 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 2,001 | Jan (past peak) |
| 50 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 1,949 | Jan (past peak) |