BBS Route · Maryland · BCR 29
Olney Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 112 species recorded across 57 survey years, still active.
112Species Recorded
57Years Surveyed
1966–2024Span
10Observers
Bird Species Found on Maryland Olney
Top 40 of 112 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| European Starling | Sturnidae | 205 | 2024 | +143% | 1968 | |
| Northern Cardinal | Cardinalidae | 127 | 2024 | +426% | 1968 | |
| Gray Catbird | Mimidae | 104 | 2024 | +722% | 1968 | |
| American Robin | Turdidae | 89 | 2024 | +66% | 1968 | |
| Chipping Sparrow | Passerellidae | 65 | 2024 | +289% | 1968 | |
| American Crow | Corvidae | 64 | 2024 | +3% | 1968 | |
| Mourning Dove | Columbidae | 63 | 2024 | +47% | 1968 | |
| Carolina Wren | Troglodytidae | 61 | 2024 | 18× | 1970 | |
| Tufted Titmouse | Paridae | 57 | 2024 | +747% | 1968 | |
| Northern Mockingbird | Mimidae | 50 | 2024 | +123% | 1968 | |
| Red-winged Blackbird | Icteridae | 48 | 2024 | -60% | 1968 | |
| Brown-headed Cowbird | Icteridae | 44 | 2024 | +223% | 1968 | |
| House Finch | Fringillidae | 44 | 2024 | +296% | 1984 | |
| Red-eyed Vireo | Vireonidae | 41 | 2024 | +457% | 1968 | |
| Song Sparrow | Passerellidae | 38 | 2024 | +146% | 1968 | |
| Red-bellied Woodpecker | Picidae | 36 | 2024 | +390% | 1968 | |
| Indigo Bunting | Cardinalidae | 30 | 2024 | +25% | 1968 | |
| Barn Swallow | Hirundinidae | 29 | 2024 | +242% | 1968 | |
| Carolina Chickadee | Paridae | 29 | 2024 | +483% | 1970 | |
| Eastern Bluebird | Turdidae | 28 | 2024 | 19× | 1972 | |
| American Goldfinch | Fringillidae | 27 | 2024 | +103% | 1968 | |
| Northern House Wren | Troglodytidae | 27 | 2024 | +160% | 1968 | |
| Blue Jay | Corvidae | 25 | 2024 | +178% | 1968 | |
| Fish Crow | Corvidae | 25 | 2024 | +671% | 1968 | |
| Cedar Waxwing | Bombycillidae | 25 | 2024 | 21× | 1972 | |
| Eastern Towhee | Passerellidae | 24 | 2024 | +73% | 1968 | |
| Downy Woodpecker | Picidae | 23 | 2024 | +444% | 1968 | |
| Eastern Wood-Pewee | Tyrannidae | 23 | 2024 | +200% | 1968 | |
| Common Yellowthroat | Parulidae | 20 | 2024 | +71% | 1968 | |
| Wood Thrush | Turdidae | 20 | 2024 | -2% | 1968 | |
| Blue-gray Gnatcatcher | Polioptilidae | 19 | 2024 | +446% | 1968 | |
| Chimney Swift | Apodidae | 15 | 2024 | +45% | 1968 | |
| House Sparrow | Passeridae | 15 | 2024 | -72% | 1968 | |
| Acadian Flycatcher | Tyrannidae | 14 | 2024 | +143% | 1968 | |
| Eastern Kingbird | Tyrannidae | 13 | 2024 | +152% | 1968 | |
| White-breasted Nuthatch | Sittidae | 13 | 2024 | 13× | 1971 | |
| Scarlet Tanager | Cardinalidae | 12 | 2024 | +32% | 1970 | |
| Baltimore Oriole | Icteridae | 10 | 2024 | +525% | 1968 | |
| Common Grackle | Icteridae | 9 | 2024 | -91% | 1968 | |
| Canada Goose | Anatidae | 9 | 2024 | +171% | 1988 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.