BirdAnalyst
Guild · Wisconsin · BBS 2025 Release · 1966–2024

Generalists In Wisconsin

All statesWisconsin

64 species in this guild. As a group they are -37%Guild trendA mean-index aggregate across the species in this group — the structural direction of the guild, with individual-species noise smoothed out.Full methodology → since 1968.

Guild SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for generalists in Wisconsin. See the full index history below.

Generalists In Wisconsin Population Forecast

If the recent trend holds, Generalists in Wisconsin is projected to stay roughly flat through 2029, near 7.0 (95% range 5.6–8.4). A 5-year backtest shows a typical error of ±4.7%, with 100% of held-out values landing inside the 95% band.

-3%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
7.0Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
5.6–8.495% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±4.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Generalists in Wisconsin is projected to stay roughly flat through 2029, near 7.0 (95% range 5.6–8.4). A 5-year backtest shows a typical error of ±4.7%, with 100% of held-out values landing inside the 95% band.19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20257.46.08.7
20267.35.98.7
20277.25.88.6
20287.15.78.5
20297.05.68.4

Member Species In Wisconsin

Generalists species in Wisconsin.
TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
Yellow-headed BlackbirdIcteridae-93%
Brewer's BlackbirdIcteridae-84%
Pine SiskinFringillidae-80%
Gray PartridgePhasianidae-78%
LeConte's SparrowPasserellidae-76%
Field SparrowPasserellidae-73%
House SparrowPasseridae-73%
Canada JayCorvidae-72%
Loggerhead ShrikeLaniidae-60%
Common GrackleIcteridae-59%
American GoshawkAccipitridae-55%
Brown ThrasherMimidae-54%
Northern HarrierAccipitridae-52%
Clay-colored SparrowPasserellidae-45%
European StarlingSturnidae-43%
Brown-headed CowbirdIcteridae-43%
Evening GrosbeakFringillidae-42%
Belted KingfisherAlcedinidae-42%
Red-winged BlackbirdIcteridae-33%
Yellow-breasted ChatIcteriidae-32%
Sharp-tailed GrousePhasianidae-29%
Rock PigeonColumbidae-28%
Purple FinchFringillidae-26%
Great Horned OwlStrigidae-26%
Baltimore OrioleIcteridae-23%
Black-billed CuckooCuculidae-22%
Song SparrowPasserellidae-18%
Scarlet TanagerCardinalidae-17%
American GoldfinchFringillidae-14%
Yellow-billed CuckooCuculidae-11%
Eastern TowheePasserellidae-7%
Sharp-shinned HawkAccipitridae-5%
American KestrelFalconidae-4%
Blue JayCorvidae+4%
Rose-breasted GrosbeakCardinalidae+7%
American CrowCorvidae+9%
Eastern Screech-OwlStrigidae+16%
Red-shouldered HawkAccipitridae+16%
White-throated SparrowPasserellidae+20%
Swamp SparrowPasserellidae+37%
Gray CatbirdMimidae+43%
Cedar WaxwingBombycillidae+43%
Indigo BuntingCardinalidae+51%
Red-tailed HawkAccipitridae+57%
Red CrossbillFringillidae+62%
Chipping SparrowPasserellidae+85%
Mourning DoveColumbidae+86%
Broad-winged HawkAccipitridae+90%
Ruffed GrousePhasianidae+99%
MerlinFalconidae+108%
Cooper's HawkAccipitridae+108%
Lincoln's SparrowPasserellidae+113%
White-winged CrossbillFringillidae+114%
Common RavenCorvidae+237%
Northern CardinalCardinalidae+237%
Ruby-throated HummingbirdTrochilidae+280%
OspreyPandionidae+359%
Barred OwlStrigidae+411%
Eurasian Collared-DoveColumbidae16×
Bald EagleAccipitridae17×
Orchard OrioleIcteridae23×
House FinchFringillidae44×
Turkey VultureCathartidae60×
Wild TurkeyPhasianidae228×

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.