BBS Route · Pennsylvania · BCR 28
Doubling Gap Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 89 species recorded across 12 survey years, no longer active.
89Species Recorded
12Years Surveyed
1966–1977Span
3Observers
Bird Species Found on Pennsylvania Doubling Gap
Top 40 of 89 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| House Sparrow | Passeridae | 96 | 1977 | -32% | 1968 | |
| Red-winged Blackbird | Icteridae | 81 | 1977 | +15% | 1968 | |
| European Starling | Sturnidae | 77 | 1977 | -30% | 1968 | |
| Common Grackle | Icteridae | 69 | 1977 | -68% | 1968 | |
| American Robin | Turdidae | 60 | 1977 | -37% | 1968 | |
| Rock Pigeon | Columbidae | 53 | 1977 | -41% | 1968 | |
| Barn Swallow | Hirundinidae | 42 | 1977 | +190% | 1968 | |
| American Crow | Corvidae | 40 | 1977 | +68% | 1968 | |
| Song Sparrow | Passerellidae | 32 | 1977 | +187% | 1968 | |
| Mourning Dove | Columbidae | 30 | 1977 | +69% | 1968 | |
| Indigo Bunting | Cardinalidae | 27 | 1977 | +116% | 1968 | |
| Gray Catbird | Mimidae | 24 | 1977 | -17% | 1968 | |
| Field Sparrow | Passerellidae | 22 | 1977 | +124% | 1968 | |
| Chipping Sparrow | Passerellidae | 19 | 1977 | +47% | 1968 | |
| Eastern Meadowlark | Icteridae | 18 | 1977 | -43% | 1968 | |
| Northern Cardinal | Cardinalidae | 16 | 1977 | +38% | 1968 | |
| Killdeer | Charadriidae | 15 | 1977 | +333% | 1968 | |
| American Goldfinch | Fringillidae | 15 | 1977 | +27% | 1968 | |
| Wood Thrush | Turdidae | 15 | 1977 | +50% | 1968 | |
| Ring-necked Pheasant | Phasianidae | 14 | 1977 | +46% | 1968 | |
| Common Yellowthroat | Parulidae | 13 | 1977 | +143% | 1968 | |
| Mallard | Anatidae | 11 | 1977 | +186% | 1969 | |
| Chimney Swift | Apodidae | 10 | 1977 | -6% | 1968 | |
| Purple Martin | Hirundinidae | 10 | 1977 | +3% | 1970 | |
| Northern House Wren | Troglodytidae | 8 | 1977 | -16% | 1968 | |
| Brown-headed Cowbird | Icteridae | 6 | 1977 | -70% | 1968 | |
| Baltimore Oriole | Icteridae | 6 | 1977 | -29% | 1968 | |
| Northern Rough-winged Swallow | Hirundinidae | 6 | 1976 | +75% | 1972 | |
| Northern Mockingbird | Mimidae | 5 | 1977 | +80% | 1968 | |
| Northern Bobwhite | Odontophoridae | 4 | 1977 | -65% | 1968 | |
| Eastern Phoebe | Tyrannidae | 4 | 1977 | +18% | 1970 | |
| Blue Jay | Corvidae | 4 | 1977 | -7% | 1968 | |
| Scarlet Tanager | Cardinalidae | 4 | 1976 | +60% | 1968 | |
| Northern Parula | Parulidae | 3 | 1967 | +50% | 1966 | |
| Yellow Warbler | Parulidae | 3 | 1977 | +75% | 1968 | |
| Brown Thrasher | Mimidae | 3 | 1976 | -75% | 1968 | |
| Carolina Wren | Troglodytidae | 3 | 1976 | +150% | 1967 | |
| Tufted Titmouse | Paridae | 3 | 1977 | -65% | 1968 | |
| Great Horned Owl | Strigidae | 2 | 1966 | n/a | n/a | |
| Belted Kingfisher | Alcedinidae | 2 | 1977 | +233% | 1972 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.