BBS Route · Delaware · BCR 30
Frederica Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 105 species recorded across 48 survey years, still active.
105Species Recorded
48Years Surveyed
1966–2014Span
5Observers
Bird Species Found on Delaware Frederica
Top 40 of 105 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Purple Martin | Hirundinidae | 88 | 2014 | +840% | 1968 | |
| European Starling | Sturnidae | 86 | 2014 | +68% | 1968 | |
| American Robin | Turdidae | 62 | 2014 | +186% | 1968 | |
| Common Grackle | Icteridae | 61 | 2014 | -20% | 1968 | |
| Barn Swallow | Hirundinidae | 43 | 2014 | +94% | 1968 | |
| House Sparrow | Passeridae | 42 | 2014 | -60% | 1968 | |
| Chipping Sparrow | Passerellidae | 30 | 2014 | -5% | 1968 | |
| Turkey Vulture | Cathartidae | 22 | 2014 | +243% | 1968 | |
| Northern Cardinal | Cardinalidae | 22 | 2014 | +52% | 1968 | |
| Northern Mockingbird | Mimidae | 19 | 2014 | -30% | 1968 | |
| American Goldfinch | Fringillidae | 18 | 2014 | +23% | 1968 | |
| Mourning Dove | Columbidae | 17 | 2014 | -30% | 1968 | |
| American Crow | Corvidae | 17 | 2014 | +16% | 1968 | |
| Horned Lark | Alaudidae | 16 | 2014 | +33% | 1968 | |
| Brown-headed Cowbird | Icteridae | 16 | 2014 | +421% | 1968 | |
| Blue Grosbeak | Cardinalidae | 16 | 2014 | +214% | 1968 | |
| Eastern Bluebird | Turdidae | 15 | 2014 | +400% | 1971 | |
| Indigo Bunting | Cardinalidae | 14 | 2014 | +59% | 1968 | |
| Blue Jay | Corvidae | 11 | 2014 | +103% | 1968 | |
| Red-eyed Vireo | Vireonidae | 10 | 2014 | +14% | 1968 | |
| Tree Swallow | Hirundinidae | 10 | 2014 | +91% | 1999 | |
| Great Crested Flycatcher | Tyrannidae | 8 | 2014 | -23% | 1968 | |
| Pine Warbler | Parulidae | 8 | 2014 | +100% | 1971 | |
| Eastern Wood-Pewee | Tyrannidae | 7 | 2014 | +54% | 1968 | |
| Song Sparrow | Passerellidae | 7 | 2014 | +106% | 1968 | |
| Carolina Chickadee | Paridae | 6 | 2014 | +170% | 1969 | |
| Killdeer | Charadriidae | 6 | 2014 | +100% | 1969 | |
| Fish Crow | Corvidae | 6 | 2014 | +167% | 1979 | |
| House Finch | Fringillidae | 6 | 2014 | +360% | 1984 | |
| Ruby-throated Hummingbird | Trochilidae | 6 | 2014 | +167% | 2001 | |
| Double-crested Cormorant | Phalacrocoracidae | 6 | 2007 | n/a | n/a | |
| Chimney Swift | Apodidae | 5 | 2014 | -77% | 1968 | |
| Grasshopper Sparrow | Passerellidae | 5 | 2014 | +12% | 1968 | |
| Ring-billed Gull | Laridae | 5 | 2013 | +133% | 1997 | |
| Cedar Waxwing | Bombycillidae | 5 | 2014 | +64% | 2001 | |
| Black Vulture | Cathartidae | 5 | 2014 | +20% | 2009 | |
| Orchard Oriole | Icteridae | 4 | 2010 | -20% | 1968 | |
| White-eyed Vireo | Vireonidae | 4 | 2014 | -9% | 1968 | |
| Carolina Wren | Troglodytidae | 4 | 2014 | +336% | 1968 | |
| Northern House Wren | Troglodytidae | 4 | 2014 | -14% | 1968 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.