BBS Route · Maryland · BCR 29
Upper Xrds Bird Survey Route
A standard 50-stop Breeding Bird Survey route. 100 species recorded across 43 survey years, no longer active.
100Species Recorded
43Years Surveyed
1966–2008Span
1Observers
Bird Species Found on Maryland Upper Xrds
Top 40 of 100 species by most recent count. Each links to its species trend.
| History | ||||||
|---|---|---|---|---|---|---|
| American Robin | Turdidae | 73 | 2008 | -32% | 1968 | |
| House Sparrow | Passeridae | 60 | 2008 | -33% | 1968 | |
| European Starling | Sturnidae | 59 | 2008 | -69% | 1968 | |
| Mourning Dove | Columbidae | 48 | 2008 | -2% | 1968 | |
| American Crow | Corvidae | 40 | 2008 | +22% | 1968 | |
| Northern Mockingbird | Mimidae | 40 | 2008 | -33% | 1968 | |
| Canada Goose | Anatidae | 35 | 2008 | +237% | 1994 | |
| Northern Cardinal | Cardinalidae | 32 | 2008 | +94% | 1968 | |
| Common Grackle | Icteridae | 31 | 2008 | -73% | 1968 | |
| Gray Catbird | Mimidae | 25 | 2008 | +125% | 1968 | |
| Song Sparrow | Passerellidae | 21 | 2008 | -34% | 1968 | |
| Blue Jay | Corvidae | 16 | 2008 | -39% | 1968 | |
| Red-winged Blackbird | Icteridae | 16 | 2008 | -73% | 1968 | |
| Tufted Titmouse | Paridae | 16 | 2008 | +114% | 1968 | |
| Chipping Sparrow | Passerellidae | 14 | 2008 | -24% | 1968 | |
| Double-crested Cormorant | Phalacrocoracidae | 13 | 2005 | +275% | 2001 | |
| Turkey Vulture | Cathartidae | 12 | 2008 | +263% | 1995 | |
| Barn Swallow | Hirundinidae | 11 | 2008 | -26% | 1968 | |
| Carolina Wren | Troglodytidae | 11 | 2008 | +246% | 1969 | |
| House Finch | Fringillidae | 11 | 2008 | +114% | 1981 | |
| Red-bellied Woodpecker | Picidae | 10 | 2008 | -3% | 1968 | |
| Chimney Swift | Apodidae | 9 | 2008 | -52% | 1968 | |
| Great Horned Owl | Strigidae | 7 | 1994 | +80% | 1986 | |
| Red-eyed Vireo | Vireonidae | 5 | 2008 | -52% | 1968 | |
| Ovenbird | Parulidae | 5 | 2006 | +167% | 1969 | |
| Orchard Oriole | Icteridae | 4 | 2007 | +38% | 1968 | |
| Northern House Wren | Troglodytidae | 4 | 2008 | -51% | 1968 | |
| Bank Swallow | Hirundinidae | 4 | 1970 | n/a | n/a | |
| Black-billed Cuckoo | Cuculidae | 4 | 2004 | +150% | 1987 | |
| Great Blue Heron | Ardeidae | 4 | 2007 | +125% | 1992 | |
| Great Crested Flycatcher | Tyrannidae | 3 | 2006 | -33% | 1968 | |
| American Goldfinch | Fringillidae | 3 | 2008 | -50% | 1968 | |
| Indigo Bunting | Cardinalidae | 3 | 2008 | -86% | 1968 | |
| Scarlet Tanager | Cardinalidae | 3 | 2006 | -29% | 1970 | |
| Common Yellowthroat | Parulidae | 3 | 2008 | -42% | 1968 | |
| Yellow-breasted Chat | Icteriidae | 3 | 1999 | -14% | 1968 | |
| Brown Thrasher | Mimidae | 3 | 2007 | -46% | 1968 | |
| Killdeer | Charadriidae | 3 | 2008 | +75% | 1969 | |
| Blue Grosbeak | Cardinalidae | 3 | 2007 | +67% | 1971 | |
| Mallard | Anatidae | 3 | 2008 | +450% | 1971 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.