Guild · New Jersey · BBS 2025 Release · 1966–2024
Generalists In New Jersey
51 species in this guild. As a group they are -53% since 1968.
Guild Signals
guild collapsecomputed index
Generalists as a group have fallen sharply in New Jersey, down 53% since 1968.
Forecast
If the recent trend holds, Generalists in New Jersey is projected to fall about 31% by 2029 — from 8.4 in 2024 to a central estimate of 5.8 (95% range 3.3–8.3). A 5-year backtest shows a typical error of ±15.6%, with 100% of held-out values landing inside the 95% band.
-31%Change by 2029
5.8Projected 2029 index
3.3–8.395% range
±15.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 6.6 | 4.0 | 9.1 |
| 2026 | 6.4 | 3.9 | 8.9 |
| 2027 | 6.2 | 3.7 | 8.7 |
| 2028 | 6.0 | 3.5 | 8.5 |
| 2029 | 5.8 | 3.3 | 8.3 |
Member Species In New Jersey
| Brown Thrasher | Mimidae | -90% |
| American Kestrel | Falconidae | -88% |
| Yellow-breasted Chat | Icteriidae | -88% |
| Common Grackle | Icteridae | -82% |
| Swamp Sparrow | Passerellidae | -80% |
| Eastern Towhee | Passerellidae | -74% |
| Northern Mockingbird | Mimidae | -70% |
| Field Sparrow | Passerellidae | -69% |
| Broad-winged Hawk | Accipitridae | -69% |
| Black-billed Cuckoo | Cuculidae | -68% |
| House Sparrow | Passeridae | -66% |
| European Starling | Sturnidae | -59% |
| Rock Pigeon | Columbidae | -57% |
| Belted Kingfisher | Alcedinidae | -52% |
| Blue Jay | Corvidae | -47% |
| Ruffed Grouse | Phasianidae | -15% |
| Baltimore Oriole | Icteridae | -15% |
| Red-winged Blackbird | Icteridae | -14% |
| Northern Harrier | Accipitridae | -13% |
| Eastern Screech-Owl | Strigidae | -12% |
| Yellow-billed Cuckoo | Cuculidae | -3% |
| Orchard Oriole | Icteridae | +4% |
| American Crow | Corvidae | +5% |
| Mourning Dove | Columbidae | +8% |
| Song Sparrow | Passerellidae | +16% |
| Indigo Bunting | Cardinalidae | +17% |
| Boat-tailed Grackle | Icteridae | +25% |
| Chipping Sparrow | Passerellidae | +41% |
| Sharp-shinned Hawk | Accipitridae | +62% |
| Rose-breasted Grosbeak | Cardinalidae | +63% |
| Scarlet Tanager | Cardinalidae | +114% |
| Turkey Vulture | Cathartidae | +119% |
| Blue Grosbeak | Cardinalidae | +142% |
| Gray Catbird | Mimidae | +151% |
| Great Horned Owl | Strigidae | +152% |
| Northern Cardinal | Cardinalidae | +156% |
| Bald Eagle | Accipitridae | +167% |
| Brown-headed Cowbird | Icteridae | +168% |
| Summer Tanager | Cardinalidae | +202% |
| American Goldfinch | Fringillidae | +249% |
| Fish Crow | Corvidae | +327% |
| Ruby-throated Hummingbird | Trochilidae | +330% |
| Cooper's Hawk | Accipitridae | +359% |
| Osprey | Pandionidae | +488% |
| Red-shouldered Hawk | Accipitridae | +512% |
| Black Vulture | Cathartidae | +974% |
| Common Raven | Corvidae | 11× |
| Red-tailed Hawk | Accipitridae | 13× |
| Wild Turkey | Phasianidae | 13× |
| Cedar Waxwing | Bombycillidae | 30× |
| House Finch | Fringillidae | 68× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.