Guild · Massachusetts · BBS 2025 Release · 1966–2024
Generalists In Massachusetts
47 species in this guild. As a group they are -46% since 1968.
Guild Signals
guild collapsecomputed index
Generalists as a group have declined in Massachusetts, down 46% since 1968.
Forecast
If the recent trend holds, Generalists in Massachusetts is projected to fall about 32% by 2029 — from 8.3 in 2024 to a central estimate of 5.6 (95% range 2.6–8.7). A 5-year backtest shows a typical error of ±29.5%, with 80% of held-out values landing inside the 95% band.
-32%Change by 2029
5.6Projected 2029 index
2.6–8.795% range
±29.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 6.0 | 3.0 | 9.1 |
| 2026 | 5.9 | 2.9 | 9.0 |
| 2027 | 5.8 | 2.8 | 8.9 |
| 2028 | 5.7 | 2.7 | 8.8 |
| 2029 | 5.6 | 2.6 | 8.7 |
Member Species In Massachusetts
| White-throated Sparrow | Passerellidae | -98% |
| Brown Thrasher | Mimidae | -94% |
| Field Sparrow | Passerellidae | -87% |
| Purple Finch | Fringillidae | -84% |
| Eastern Towhee | Passerellidae | -81% |
| American Kestrel | Falconidae | -81% |
| European Starling | Sturnidae | -76% |
| Common Grackle | Icteridae | -75% |
| Blue Jay | Corvidae | -62% |
| Baltimore Oriole | Icteridae | -60% |
| Rock Pigeon | Columbidae | -57% |
| Ruffed Grouse | Phasianidae | -56% |
| Belted Kingfisher | Alcedinidae | -31% |
| House Sparrow | Passeridae | -30% |
| Rose-breasted Grosbeak | Cardinalidae | -28% |
| Red-winged Blackbird | Icteridae | -27% |
| Evening Grosbeak | Fringillidae | -17% |
| Song Sparrow | Passerellidae | +5% |
| Scarlet Tanager | Cardinalidae | +8% |
| American Crow | Corvidae | +22% |
| Brown-headed Cowbird | Icteridae | +30% |
| Sharp-shinned Hawk | Accipitridae | +32% |
| Great Horned Owl | Strigidae | +32% |
| Gray Catbird | Mimidae | +59% |
| Indigo Bunting | Cardinalidae | +85% |
| Swamp Sparrow | Passerellidae | +87% |
| Orchard Oriole | Icteridae | +93% |
| Broad-winged Hawk | Accipitridae | +99% |
| Black-billed Cuckoo | Cuculidae | +107% |
| Cooper's Hawk | Accipitridae | +107% |
| Chipping Sparrow | Passerellidae | +109% |
| Barred Owl | Strigidae | +111% |
| Yellow-billed Cuckoo | Cuculidae | +123% |
| Mourning Dove | Columbidae | +202% |
| Northern Mockingbird | Mimidae | +230% |
| American Goldfinch | Fringillidae | +233% |
| Cedar Waxwing | Bombycillidae | +289% |
| Ruby-throated Hummingbird | Trochilidae | +371% |
| Red-shouldered Hawk | Accipitridae | +388% |
| Turkey Vulture | Cathartidae | +530% |
| Common Raven | Corvidae | +678% |
| Fish Crow | Corvidae | +764% |
| Osprey | Pandionidae | +986% |
| Red-tailed Hawk | Accipitridae | +990% |
| House Finch | Fringillidae | 12× |
| Wild Turkey | Phasianidae | 34× |
| Northern Cardinal | Cardinalidae | 60× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.