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

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 →
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 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 78% 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 2029, near 16 (95% range 13–18). A 5-year backtest shows a typical error of ±8.1%, with 100% of held-out values landing inside the 95% band.

+4%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 →
16Projected 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 →
13–1895% 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 →
±8.1%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 2029, near 16 (95% range 13–18). A 5-year backtest shows a typical error of ±8.1%, 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 →
2025151318
2026151318
2027161318
2028161318
2029161318

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 River5520241966
Raymond5020241966
Trempealeau4820241966
Brownsville4620241966
River Falls3620241998
Beloit3520241998
Viroqua3320241966
Pardeeville3320241967
Eden3220241966
Wis Rapids3020231966
Dresser2820241966
N Freedom2820241966
Paris2820241966
Stevens Pt2620231966
Hazel Green2620241966
Wiota2620241966
Omro 22620242002
Grimms2520211998
Highland2520241998
Oconto Falls2420231968
Casco2420241966
N Andover2420241967
Gresham2420241998
Cadott2320241966
Kendall2320231967

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 2026-05-22.