Guild · Alaska · BBS 2025 Release · 1966–2024
Generalists In Alaska
65 species in this guild. As a group they are -70% since 1972.
Guild Signals
guild collapsecomputed index
Generalists as a group have fallen sharply in Alaska, down 70% since 1972.
Forecast
If the recent trend holds, Generalists in Alaska is projected to fall about 81% by 2029 — from 1.9 in 2024 to a central estimate of 0.35 (95% range 0.00–2.9). A 5-year backtest shows a typical error of ±74.8%, with 100% of held-out values landing inside the 95% band.
-81%Change by 2029
0.35Projected 2029 index
0.00–2.995% range
±74.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.68 | 0.00 | 3.3 |
| 2026 | 0.59 | 0.00 | 3.2 |
| 2027 | 0.51 | 0.00 | 3.1 |
| 2028 | 0.43 | 0.00 | 3.0 |
| 2029 | 0.35 | 0.00 | 2.9 |
Member Species In Alaska
| Gray-crowned Rosy-Finch | Fringillidae | -92% |
| Parasitic Jaeger | Stercorariidae | -88% |
| European Starling | Sturnidae | -88% |
| Sooty Grouse | Phasianidae | -86% |
| Rock Ptarmigan | Phasianidae | -86% |
| Pine Siskin | Fringillidae | -85% |
| Rufous Hummingbird | Trochilidae | -85% |
| American Dipper | Cinclidae | -84% |
| Rock Pigeon | Columbidae | -84% |
| Spruce Grouse | Phasianidae | -83% |
| Bohemian Waxwing | Bombycillidae | -79% |
| Red Crossbill | Fringillidae | -79% |
| Golden Eagle | Accipitridae | -77% |
| American Goshawk | Accipitridae | -77% |
| Bald Eagle | Accipitridae | -76% |
| Northern Hawk Owl | Strigidae | -76% |
| Steller's Jay | Corvidae | -73% |
| Eastern Yellow Wagtail | Motacillidae | -73% |
| Boreal Owl | Strigidae | -72% |
| Belted Kingfisher | Alcedinidae | -71% |
| Northern Harrier | Accipitridae | -66% |
| Northern Shrike | Laniidae | -64% |
| Pine Grosbeak | Fringillidae | -61% |
| Sharp-shinned Hawk | Accipitridae | -60% |
| Red-winged Blackbird | Icteridae | -59% |
| Gyrfalcon | Falconidae | -57% |
| Short-eared Owl | Strigidae | -54% |
| Lapland Longspur | Calcariidae | -53% |
| Great Horned Owl | Strigidae | -49% |
| Arctic Warbler | Phylloscopidae | -49% |
| Pigeon Guillemot | Alcidae | -49% |
| American Kestrel | Falconidae | -49% |
| American Pipit | Motacillidae | -48% |
| Song Sparrow | Passerellidae | -47% |
| American Crow | Corvidae | -39% |
| Chipping Sparrow | Passerellidae | -39% |
| Rusty Blackbird | Icteridae | -32% |
| White-crowned Sparrow | Passerellidae | -28% |
| Northern Saw-whet Owl | Strigidae | -18% |
| Northern Pygmy-Owl | Strigidae | -9% |
| Red-tailed Hawk | Accipitridae | +3% |
| Cedar Waxwing | Bombycillidae | +4% |
| Canada Jay | Corvidae | +9% |
| Northern Wheatear | Muscicapidae | +12% |
| Lincoln's Sparrow | Passerellidae | +22% |
| Eurasian Collared-Dove | Columbidae | +22% |
| Ruffed Grouse | Phasianidae | +37% |
| Common Raven | Corvidae | +48% |
| Great Gray Owl | Strigidae | +48% |
| Peregrine Falcon | Falconidae | +48% |
| Merlin | Falconidae | +76% |
| Fox Sparrow | Passerellidae | +82% |
| Willow Ptarmigan | Phasianidae | +87% |
| Marbled Murrelet | Alcidae | +97% |
| Black-billed Magpie | Corvidae | +98% |
| Rough-legged Hawk | Accipitridae | +121% |
| White-winged Crossbill | Fringillidae | +151% |
| Western Tanager | Cardinalidae | +208% |
| Golden-crowned Sparrow | Passerellidae | +240% |
| Snow Bunting | Calcariidae | +252% |
| Bluethroat | Muscicapidae | +328% |
| Long-tailed Jaeger | Stercorariidae | +342% |
| Osprey | Pandionidae | +359% |
| American Tree Sparrow | Passerellidae | +518% |
| Smith's Longspur | Calcariidae | 12× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.