60 birds were recorded seen in Delaware in March in our iNaturalist sample; 12 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top birds in March

Bald Eagle

Great Blue Heron
Green-winged Teal

Northern Shoveler

Osprey
Canada Goose

Song Sparrow

American Avocet

Northern Cardinal

American Robin

Mallard

Snow Goose
All birds seen in Delaware in March
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Bald Eagle | Haliaeetus leucocephalus | Hawks, Eagles, and Kites | 248 | Apr (rising) |
| 2 | Great Blue Heron | Ardea herodias | Herons, Egrets, and Bitterns | 195 | May (rising) |
| 3 | Green-winged Teal | Anas crecca | Ducks, Geese, and Swans | 158 | Mar (peak) |
| 4 | Northern Shoveler | Spatula clypeata | Ducks, Geese, and Swans | 156 | Mar (peak) |
| 5 | Osprey | Pandion haliaetus | Ospreys | 150 | Jul (rising) |
| 6 | Canada Goose | Branta canadensis | Ducks, Geese, and Swans | 147 | May (rising) |
| 7 | Song Sparrow | Melospiza melodia | New World Sparrows | 139 | Jan (past peak) |
| 8 | American Avocet | Recurvirostra americana | Stilts and Avocets | 133 | Aug (rising) |
| 9 | Northern Cardinal | Cardinalis cardinalis | Cardinals and Allies | 133 | Apr (rising) |
| 10 | American Robin | Turdus migratorius | Thrushes | 127 | Apr (rising) |
| 11 | Mallard | Anas platyrhynchos | Ducks, Geese, and Swans | 124 | May (rising) |
| 12 | Snow Goose | Anser caerulescens | Ducks, Geese, and Swans | 118 | Dec (rising) |
| 13 | Red-winged Blackbird | Agelaius phoeniceus | New World Blackbirds and Orioles | 111 | May (rising) |
| 14 | Northern Pintail | Anas acuta | Ducks, Geese, and Swans | 102 | Feb (past peak) |
| 15 | Bufflehead | Bucephala albeola | Ducks, Geese, and Swans | 102 | Jan (past peak) |
| 16 | White-throated Sparrow | Zonotrichia albicollis | New World Sparrows | 97 | Jan (past peak) |
| 17 | Northern Harrier | Circus hudsonius | Hawks, Eagles, and Kites | 97 | Dec (rising) |
| 18 | Turkey Vulture | Cathartes aura | New World Vultures | 95 | Apr (rising) |
| 19 | Greater Yellowlegs | Tringa melanoleuca | Sandpipers and Allies | 90 | Apr (rising) |
| 20 | Red-tailed Hawk | Buteo jamaicensis | Hawks, Eagles, and Kites | 90 | Jan (past peak) |
| 21 | Red-bellied Woodpecker | Melanerpes carolinus | Woodpeckers | 88 | Mar (peak) |
| 22 | Eastern Bluebird | Sialia sialis | Thrushes | 85 | Mar (peak) |
| 23 | Ring-necked Duck | Aythya collaris | Ducks, Geese, and Swans | 81 | Mar (peak) |
| 24 | Northern Mockingbird | Mimus polyglottos | Mockingbirds and Thrashers | 81 | Apr (rising) |
| 25 | Yellow-rumped Warbler | Setophaga coronata | New World Warblers | 80 | Oct (rising) |
| 26 | Red-breasted Merganser | Mergus serrator | Ducks, Geese, and Swans | 71 | Feb (past peak) |
| 27 | Ring-billed Gull | Larus delawarensis | Gulls, Terns, and Skimmers | 69 | Aug (rising) |
| 28 | Mute Swan | Cygnus olor | Ducks, Geese, and Swans | 69 | May (rising) |
| 29 | Downy Woodpecker | Dryobates pubescens | Woodpeckers | 67 | Feb (past peak) |
| 30 | Northern Flicker | Colaptes auratus | Woodpeckers | 65 | Mar (peak) |
| 31 | Ruddy Duck | Oxyura jamaicensis | Ducks, Geese, and Swans | 63 | Mar (peak) |
| 32 | Pine Warbler | Setophaga pinus | New World Warblers | 59 | Mar (peak) |
| 33 | Mourning Dove | Zenaida macroura | Pigeons and Doves | 58 | Apr (rising) |
| 34 | American Black Duck | Anas rubripes | Ducks, Geese, and Swans | 58 | Jan (past peak) |
| 35 | Blue Jay | Cyanocitta cristata | Crows, Jays, and Magpies | 58 | Apr (rising) |
| 36 | Carolina Chickadee | Poecile carolinensis | Tits, Chickadees, and Titmice | 58 | Apr (rising) |
| 37 | Dark-eyed Junco | Junco hyemalis | New World Sparrows | 56 | Jan (past peak) |
| 38 | Tree Swallow | Tachycineta bicolor | Swallows and Martins | 52 | May (rising) |
| 39 | Northern Gannet | Morus bassanus | Boobies and Gannets | 51 | Mar (peak) |
| 40 | Carolina Wren | Thryothorus ludovicianus | Wrens | 51 | May (rising) |
| 41 | American Coot | Fulica americana | Rails, Gallinules, and Coots | 50 | Mar (peak) |
| 42 | Double-crested Cormorant | Nannopterum auritum | Cormorants and Shags | 50 | Aug (rising) |
| 43 | Pied-billed Grebe | Podilymbus podiceps | Grebes | 49 | Mar (peak) |
| 44 | Long-tailed Duck | Clangula hyemalis | Ducks, Geese, and Swans | 49 | Jan (past peak) |
| 45 | Common Merganser | Mergus merganser | Ducks, Geese, and Swans | 48 | Feb (past peak) |
| 46 | Tufted Titmouse | Baeolophus bicolor | Tits, Chickadees, and Titmice | 48 | Jan (past peak) |
| 47 | Wilson's Snipe | Gallinago delicata | Sandpipers and Allies | 48 | Mar (peak) |
| 48 | Cooper's Hawk | Astur cooperii | Hawks, Eagles, and Kites | 48 | Oct (rising) |
| 49 | Red-throated Loon | Gavia stellata | Loons | 46 | Jan (past peak) |
| 50 | Surf Scoter | Melanitta perspicillata | Ducks, Geese, and Swans | 46 | Jan (past peak) |