Guild · Idaho · BBS 2025 Release · 1966–2024
Generalists In Idaho
74 species in this guild. As a group they are -65% since 1970.
Guild Signals
guild collapsecomputed index
Generalists as a group have fallen sharply in Idaho, down 65% since 1970.
Forecast
If the recent trend holds, Generalists in Idaho is projected to fall about 51% by 2029 — from 3.1 in 2024 to a central estimate of 1.5 (95% range 0.00–4.8). A 5-year backtest shows a typical error of ±54.3%, with 100% of held-out values landing inside the 95% band.
-51%Change by 2029
1.5Projected 2029 index
0.00–4.895% range
±54.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.9 | 0.00 | 5.2 |
| 2026 | 1.8 | 0.00 | 5.1 |
| 2027 | 1.7 | 0.00 | 5.0 |
| 2028 | 1.6 | 0.00 | 4.9 |
| 2029 | 1.5 | 0.00 | 4.8 |
Member Species In Idaho
| Chukar | Phasianidae | -92% |
| Sharp-tailed Grouse | Phasianidae | -90% |
| Cooper's Hawk | Accipitridae | -87% |
| Evening Grosbeak | Fringillidae | -82% |
| Dusky Grouse | Phasianidae | -81% |
| Belted Kingfisher | Alcedinidae | -81% |
| Brewer's Blackbird | Icteridae | -80% |
| Steller's Jay | Corvidae | -78% |
| American Goshawk | Accipitridae | -77% |
| House Sparrow | Passeridae | -74% |
| Yellow-headed Blackbird | Icteridae | -74% |
| Pine Grosbeak | Fringillidae | -70% |
| Merlin | Falconidae | -68% |
| Red-winged Blackbird | Icteridae | -63% |
| Black-billed Magpie | Corvidae | -60% |
| European Starling | Sturnidae | -58% |
| Mourning Dove | Columbidae | -56% |
| Short-eared Owl | Strigidae | -54% |
| Burrowing Owl | Strigidae | -48% |
| Great Horned Owl | Strigidae | -46% |
| Northern Harrier | Accipitridae | -43% |
| Greater Sage-Grouse | Phasianidae | -43% |
| Gray Partridge | Phasianidae | -39% |
| Clark's Nutcracker | Corvidae | -38% |
| Ruffed Grouse | Phasianidae | -31% |
| Sharp-shinned Hawk | Accipitridae | -29% |
| Brown-headed Cowbird | Icteridae | -24% |
| Golden Eagle | Accipitridae | -22% |
| House Finch | Fringillidae | -19% |
| White-crowned Sparrow | Passerellidae | -15% |
| Rufous Hummingbird | Trochilidae | -14% |
| Brewer's Sparrow | Passerellidae | -13% |
| Rock Pigeon | Columbidae | -10% |
| American Crow | Corvidae | -4% |
| Gray Catbird | Mimidae | -4% |
| Common Grackle | Icteridae | +7% |
| Bald Eagle | Accipitridae | +8% |
| American Kestrel | Falconidae | +13% |
| American Goldfinch | Fringillidae | +19% |
| American Dipper | Cinclidae | +20% |
| California Quail | Odontophoridae | +33% |
| Canada Jay | Corvidae | +45% |
| Osprey | Pandionidae | +52% |
| Calliope Hummingbird | Trochilidae | +57% |
| Bullock's Oriole | Icteridae | +58% |
| Chipping Sparrow | Passerellidae | +61% |
| Cedar Waxwing | Bombycillidae | +68% |
| Prairie Falcon | Falconidae | +69% |
| Song Sparrow | Passerellidae | +74% |
| Spruce Grouse | Phasianidae | +88% |
| Turkey Vulture | Cathartidae | +104% |
| Lesser Goldfinch | Fringillidae | +105% |
| Sage Thrasher | Mimidae | +106% |
| Spotted Towhee | Passerellidae | +108% |
| Loggerhead Shrike | Laniidae | +142% |
| Black-chinned Hummingbird | Trochilidae | +148% |
| Pine Siskin | Fringillidae | +164% |
| Wild Turkey | Phasianidae | +209% |
| Green-tailed Towhee | Passerellidae | +213% |
| Common Raven | Corvidae | +278% |
| Black-headed Grosbeak | Cardinalidae | +323% |
| Red Crossbill | Fringillidae | +352% |
| Western Tanager | Cardinalidae | +362% |
| Sagebrush Sparrow | Passerellidae | +364% |
| Fox Sparrow | Passerellidae | +365% |
| Red-tailed Hawk | Accipitridae | +481% |
| Cassin's Finch | Fringillidae | +507% |
| Yellow-breasted Chat | Icteriidae | +600% |
| Lazuli Bunting | Cardinalidae | +602% |
| Broad-tailed Hummingbird | Trochilidae | +612% |
| Swainson's Hawk | Accipitridae | +622% |
| Ferruginous Hawk | Accipitridae | +675% |
| Eurasian Collared-Dove | Columbidae | +878% |
| Lincoln's Sparrow | Passerellidae | 14× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.