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Species · Wisconsin · BBS 2026 Release · 1966–2025

Yellow-bellied Sapsucker Population Trend in Wisconsin

All statesForest birds

Yellow-bellied Sapsucker in Wisconsin has surged: up 371% on the route-weighted index since 1968.

+371%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 →
79Routes 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 →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Yellow-bellied Sapsucker 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Yellow-bellied Sapsucker has surged in Wisconsin: up 371% on the route-weighted index since 1968.

Yellow-bellied Sapsucker Population Forecast in Wisconsin

If the recent trend holds, Yellow-bellied Sapsucker in Wisconsin is projected to stay roughly flat through 2030, near 3.3 (95% range 2.4–4.3). A 5-year backtest shows a typical error of ±34.3%, with 60% of held-out values landing inside the 95% band.

-1%Change by 2030TrendPercent 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 →
3.3Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
2.4–4.395% 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 →
±34.3%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, Yellow-bellied Sapsucker in Wisconsin is projected to stay roughly flat through 2030, near 3.3 (95% range 2.4–4.3). A 5-year backtest shows a typical error of ±34.3%, with 60% of held-out values landing inside the 95% band.19662030
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 →
20263.22.24.1
20273.22.34.1
20283.22.34.2
20293.32.34.2
20303.32.44.3

Yellow-bellied Sapsucker Survey Routes in Wisconsin

Routes recording Yellow-bellied Sapsucker 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 →
Mellen2720251998
Popple River2620251966
Cavour2420251998
Conover1820251998
Montreal1320251968
Iron River1220251967
N Freedom1120251988
Grand View1020251966
Bayfield1020251968
Land O' Lakes 21020252017
Eagle River920251966
Wausaukee920251980
Shanagolden820251966
Land O Lakes820161967
Rib Lake720251966
Amberg720251980
Flambeau720251999
Couderay620191969
Amnicon Falls620251998
Phillips520251967
Crandon520251968
Union Twp420231977
Loraine420181968
Mcnaughton420241968
Cochrane420251971

Yellow-bellied Sapsucker Population Trend in Other States

alaskaconnecticutillinoisiowamainemarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawest-virginia

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.