BirdAnalyst
Species · Wisconsin · BBS 2026 Release · 1966–2025

Northern House Wren Population Trend in Wisconsin

All statesForest birds

Northern House Wren in Wisconsin has surged: up 79% on the route-weighted index since 1968.

+79%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 →
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 Northern House Wren 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 →

Northern House Wren has surged in Wisconsin: up 79% on the route-weighted index since 1968.

Northern House Wren Population Forecast in Wisconsin

If the recent trend holds, Northern House Wren in Wisconsin is projected to stay roughly flat through 2030, near 16 (95% range 13–19). A 5-year backtest shows a typical error of ±6.2%, with 100% 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 →
16Projected 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 →
13–1995% 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 →
±6.2%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, Northern House Wren in Wisconsin is projected to stay roughly flat through 2030, near 16 (95% range 13–19). A 5-year backtest shows a typical error of ±6.2%, with 100% 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 →
2026151318
2027161318
2028161318
2029161318
2030161319

Northern House Wren Survey Routes in Wisconsin

Routes recording Northern House Wren 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 →
Fall River5620251966
River Falls5420251998
Wiota4020251966
Pardeeville3720251967
Gresham3520251998
Hazel Green3420251966
Viroqua3320241966
Eden3320251966
Beloit3320251998
N Freedom3220251966
Highland3220251998
N Andover3120251967
Wis Rapids3020231966
Kendall3020251967
New Lisbon2820251967
Meridean2820251998
Trempealeau2720251966
Cochrane2620251966
Stevens Pt2620231966
Raymond2620251966
Washington I2520251967
Casco2520251966
Brownsville2520251966
Grimms2520211998
Mukwonago 22520252005

Northern House Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawyoming

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