BBS Route · Delaware · BCR 30
Blackbird Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 129 species recorded across 29 survey years, still active.
129Species Recorded
29Years Surveyed
1994–2024Span
4Observers
Bird Species Found on Delaware Blackbird
Top 40 of 129 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| Red-winged Blackbird | Icteridae | 100 | 2024 | -75% | 1996 | |
| Purple Martin | Hirundinidae | 91 | 2024 | +134% | 1996 | |
| Common Yellowthroat | Parulidae | 52 | 2024 | -19% | 1996 | |
| Barn Swallow | Hirundinidae | 44 | 2024 | +0% | 1996 | |
| Common Grackle | Icteridae | 40 | 2024 | -84% | 1996 | |
| European Starling | Sturnidae | 38 | 2024 | +6% | 1996 | |
| Indigo Bunting | Cardinalidae | 38 | 2024 | -34% | 1996 | |
| Northern Cardinal | Cardinalidae | 33 | 2024 | +57% | 1996 | |
| American Robin | Turdidae | 32 | 2024 | -55% | 1996 | |
| Gray Catbird | Mimidae | 31 | 2024 | +20% | 1996 | |
| Mourning Dove | Columbidae | 30 | 2024 | +31% | 1996 | |
| House Sparrow | Passeridae | 28 | 2024 | -44% | 1996 | |
| Chipping Sparrow | Passerellidae | 27 | 2024 | +850% | 1996 | |
| Carolina Wren | Troglodytidae | 25 | 2024 | +382% | 1996 | |
| Ring-billed Gull | Laridae | 25 | 2017 | +35% | 2008 | |
| Great Egret | Ardeidae | 24 | 2024 | -60% | 1996 | |
| Great Blue Heron | Ardeidae | 23 | 2024 | +206% | 1996 | |
| Northern Mockingbird | Mimidae | 23 | 2024 | -27% | 1996 | |
| Brown-headed Cowbird | Icteridae | 20 | 2024 | -13% | 1996 | |
| Blue Grosbeak | Cardinalidae | 20 | 2024 | +16% | 1996 | |
| Eastern Wood-Pewee | Tyrannidae | 18 | 2024 | +54% | 1996 | |
| Blue Jay | Corvidae | 18 | 2024 | +3% | 1996 | |
| Field Sparrow | Passerellidae | 17 | 2024 | +94% | 1996 | |
| Marsh Wren | Troglodytidae | 15 | 2024 | -24% | 1996 | |
| Wood Thrush | Turdidae | 15 | 2024 | -55% | 1996 | |
| Black Skimmer | Laridae | 14 | 2023 | +131% | 2003 | |
| Rock Pigeon | Columbidae | 13 | 2024 | +21% | 1996 | |
| Red-eyed Vireo | Vireonidae | 12 | 2024 | +19% | 1996 | |
| Laughing Gull | Laridae | 11 | 2023 | +86% | 1997 | |
| Northern Bobwhite | Odontophoridae | 11 | 2024 | -61% | 1996 | |
| Yellow-billed Cuckoo | Cuculidae | 11 | 2024 | +111% | 1996 | |
| Song Sparrow | Passerellidae | 11 | 2024 | -29% | 1996 | |
| American Crow | Corvidae | 10 | 2024 | -61% | 1996 | |
| Canada Goose | Anatidae | 10 | 2024 | -33% | 1999 | |
| Herring Gull | Laridae | 9 | 2009 | -63% | 1998 | |
| Boat-tailed Grackle | Icteridae | 8 | 2015 | +120% | 1996 | |
| American Goldfinch | Fringillidae | 8 | 2024 | -71% | 1996 | |
| Yellow-breasted Chat | Icteriidae | 8 | 2024 | +200% | 1996 | |
| Horned Lark | Alaudidae | 7 | 2024 | +140% | 1996 | |
| Brown Thrasher | Mimidae | 7 | 2024 | -36% | 1996 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.