BBS Route · Pennsylvania · BCR 28
Drehersville Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 101 species recorded across 34 survey years, no longer active.
101Species Recorded
34Years Surveyed
1966–1999Span
5Observers
Bird Species Found on Pennsylvania Drehersville
Top 40 of 101 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| European Starling | Sturnidae | 160 | 1999 | +123% | 1968 | |
| Common Grackle | Icteridae | 117 | 1999 | -39% | 1968 | |
| House Sparrow | Passeridae | 102 | 1999 | +50% | 1968 | |
| Red-winged Blackbird | Icteridae | 88 | 1999 | -3% | 1968 | |
| American Robin | Turdidae | 65 | 1999 | +11% | 1968 | |
| Mourning Dove | Columbidae | 63 | 1999 | +162% | 1968 | |
| Barn Swallow | Hirundinidae | 60 | 1999 | +236% | 1968 | |
| American Crow | Corvidae | 53 | 1999 | +167% | 1968 | |
| Canada Goose | Anatidae | 50 | 1999 | +183% | 1982 | |
| Song Sparrow | Passerellidae | 35 | 1999 | +164% | 1968 | |
| American Goldfinch | Fringillidae | 34 | 1999 | +131% | 1968 | |
| Chipping Sparrow | Passerellidae | 30 | 1999 | +252% | 1968 | |
| Northern Cardinal | Cardinalidae | 25 | 1999 | +430% | 1968 | |
| Gray Catbird | Mimidae | 25 | 1999 | +154% | 1968 | |
| Indigo Bunting | Cardinalidae | 15 | 1999 | +120% | 1968 | |
| Northern House Wren | Troglodytidae | 15 | 1999 | -30% | 1968 | |
| Brown-headed Cowbird | Icteridae | 13 | 1999 | +256% | 1968 | |
| Eastern Phoebe | Tyrannidae | 12 | 1999 | +109% | 1968 | |
| Common Yellowthroat | Parulidae | 12 | 1999 | +87% | 1968 | |
| Field Sparrow | Passerellidae | 11 | 1999 | +50% | 1968 | |
| Rock Pigeon | Columbidae | 11 | 1999 | -69% | 1969 | |
| House Finch | Fringillidae | 11 | 1999 | 23× | 1974 | |
| Tree Swallow | Hirundinidae | 11 | 1998 | +475% | 1986 | |
| Mallard | Anatidae | 10 | 1999 | +47% | 1968 | |
| Blue Jay | Corvidae | 10 | 1999 | +66% | 1968 | |
| Wood Thrush | Turdidae | 8 | 1999 | -36% | 1968 | |
| Yellow Warbler | Parulidae | 8 | 1999 | +300% | 1969 | |
| Ring-necked Pheasant | Phasianidae | 6 | 1999 | -69% | 1968 | |
| Willow Flycatcher | Tyrannidae | 6 | 1999 | +160% | 1969 | |
| Downy Woodpecker | Picidae | 6 | 1999 | +71% | 1969 | |
| Red-eyed Vireo | Vireonidae | 5 | 1999 | -40% | 1968 | |
| American Kestrel | Falconidae | 5 | 1999 | +117% | 1969 | |
| Northern Rough-winged Swallow | Hirundinidae | 5 | 1999 | +133% | 1980 | |
| Red-bellied Woodpecker | Picidae | 5 | 1999 | +300% | 1985 | |
| Baltimore Oriole | Icteridae | 4 | 1999 | -78% | 1968 | |
| Scarlet Tanager | Cardinalidae | 4 | 1999 | +57% | 1968 | |
| Northern Mockingbird | Mimidae | 4 | 1999 | +7% | 1968 | |
| Great Blue Heron | Ardeidae | 4 | 1998 | +200% | 1989 | |
| Killdeer | Charadriidae | 3 | 1999 | +146% | 1968 | |
| Great Crested Flycatcher | Tyrannidae | 3 | 1999 | -41% | 1968 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.