Guild · Maryland · BBS 2025 Release · 1966–2024
Generalists In Maryland
54 species in this guild. As a group they are -37% since 1968.
Guild Signals
No notable trend signals for generalists in Maryland. See the full index history below.
Forecast
If the recent trend holds, Generalists in Maryland is projected to fall about 20% by 2029 — from 11 in 2024 to a central estimate of 9.0 (95% range 7.0–11). A 5-year backtest shows a typical error of ±12.4%, with 80% of held-out values landing inside the 95% band.
-20%Change by 2029
9.0Projected 2029 index
7.0–1195% range
±12.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 9.4 | 7.5 | 11 |
| 2026 | 9.3 | 7.4 | 11 |
| 2027 | 9.2 | 7.3 | 11 |
| 2028 | 9.1 | 7.1 | 11 |
| 2029 | 9.0 | 7.0 | 11 |
Member Species In Maryland
| Yellow-breasted Chat | Icteriidae | -84% |
| House Sparrow | Passeridae | -80% |
| Common Grackle | Icteridae | -77% |
| Black-billed Cuckoo | Cuculidae | -77% |
| Field Sparrow | Passerellidae | -76% |
| Boat-tailed Grackle | Icteridae | -65% |
| Rock Pigeon | Columbidae | -59% |
| Belted Kingfisher | Alcedinidae | -58% |
| Eastern Screech-Owl | Strigidae | -54% |
| Red-winged Blackbird | Icteridae | -47% |
| Great Horned Owl | Strigidae | -46% |
| Eastern Towhee | Passerellidae | -43% |
| European Starling | Sturnidae | -43% |
| American Kestrel | Falconidae | -41% |
| Northern Mockingbird | Mimidae | -37% |
| Blue Jay | Corvidae | -33% |
| Ruffed Grouse | Phasianidae | -30% |
| Northern Harrier | Accipitridae | -26% |
| Yellow-billed Cuckoo | Cuculidae | -14% |
| Brown Thrasher | Mimidae | -9% |
| Baltimore Oriole | Icteridae | +0% |
| American Crow | Corvidae | +2% |
| Indigo Bunting | Cardinalidae | +20% |
| Mourning Dove | Columbidae | +26% |
| Song Sparrow | Passerellidae | +31% |
| Brown-headed Cowbird | Icteridae | +37% |
| Swamp Sparrow | Passerellidae | +40% |
| Scarlet Tanager | Cardinalidae | +41% |
| Seaside Sparrow | Passerellidae | +44% |
| Gray Catbird | Mimidae | +58% |
| Chipping Sparrow | Passerellidae | +59% |
| American Goldfinch | Fringillidae | +66% |
| Northern Cardinal | Cardinalidae | +68% |
| Broad-winged Hawk | Accipitridae | +75% |
| Sharp-shinned Hawk | Accipitridae | +88% |
| Orchard Oriole | Icteridae | +114% |
| Ruby-throated Hummingbird | Trochilidae | +169% |
| Blue Grosbeak | Cardinalidae | +209% |
| Summer Tanager | Cardinalidae | +219% |
| Fish Crow | Corvidae | +240% |
| Turkey Vulture | Cathartidae | +392% |
| Purple Finch | Fringillidae | +412% |
| Barred Owl | Strigidae | +490% |
| Red-tailed Hawk | Accipitridae | +635% |
| Rose-breasted Grosbeak | Cardinalidae | +818% |
| Osprey | Pandionidae | 12× |
| Cooper's Hawk | Accipitridae | 13× |
| Red-shouldered Hawk | Accipitridae | 13× |
| Wild Turkey | Phasianidae | 15× |
| Cedar Waxwing | Bombycillidae | 20× |
| Bald Eagle | Accipitridae | 60× |
| Black Vulture | Cathartidae | 63× |
| House Finch | Fringillidae | 73× |
| Common Raven | Corvidae | 87× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.