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Species · Wisconsin · BBS 2025 Release · 1966–2024

Baltimore Oriole Population Trend in Wisconsin

All statesGeneralists

Baltimore Oriole in Wisconsin has edged down: down 23% on the route-weighted index since 1968.

-23%Since 1968TrendPercent 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 →
97Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Baltimore Oriole Trends in WisconsinNotable 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 Baltimore Oriole in Wisconsin. See the full index history below.

Baltimore Oriole Population Forecast in Wisconsin

If the recent trend holds, Baltimore Oriole in Wisconsin is projected to fall about 14% by 2029 — from 4.3 in 2024 to a central estimate of 3.7 (95% range 2.1–5.2). A 5-year backtest shows a typical error of ±21.8%, with 80% of held-out values landing inside the 95% band.

-14%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 →
3.7Projected 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 →
2.1–5.295% 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 →
±21.8%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, Baltimore Oriole in Wisconsin is projected to fall about 14% by 2029 — from 4.3 in 2024 to a central estimate of 3.7 (95% range 2.1–5.2). A 5-year backtest shows a typical error of ±21.8%, with 80% 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 →
20253.92.35.5
20263.82.35.4
20273.82.25.3
20283.72.25.3
20293.72.15.2

Baltimore Oriole Survey Routes in Wisconsin

Routes recording Baltimore Oriole in Wisconsin.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Cochrane2520231966
Grimms2120211998
Trempealeau1920241966
Loraine1820211966
Weyerhauser1720241966
Omro1620011966
Fall River1620241966
Wiota1620241966
Hazel Green1520241966
Esdaile1420241966
Pardeeville1420241967
Paris1420241966
Gresham1320241998
Gilman1220241966
Brownsville1120221974
Cumberland1020241966
Viroqua1020241966
Eden1020241966
Cadott820241966
Stratford820241966
Hebron820241966
Annaton820241998
Dresser720241966
Mukwonago 2720242005
Hudson620241966

Baltimore Oriole Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawyoming

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