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

Northern House Wren Population Trend in Indiana

All statesForest birds

Northern House Wren in Indiana has surged: up 145% on the route-weighted index since 1968.

+145%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 →
68Routes 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 IndianaNotable 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 Indiana: up 145% on the route-weighted index since 1968.

Northern House Wren Population Forecast in Indiana

If the recent trend holds, Northern House Wren in Indiana is projected to rise about 52% by 2030 — from 8.5 in 2025 to a central estimate of 13 (95% range 10–15). A 5-year backtest shows a typical error of ±15.3%, with 80% of held-out values landing inside the 95% band.

+52%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 →
13Projected 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 →
10–1595% 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 →
±15.3%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, Northern House Wren in Indiana is projected to rise about 52% by 2030 — from 8.5 in 2025 to a central estimate of 13 (95% range 10–15). A 5-year backtest shows a typical error of ±15.3%, with 80% 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 →
2026129.715
2027129.815
20281310.015
2029131015
2030131015

Northern House Wren Survey Routes in Indiana

Routes recording Northern House Wren in Indiana.
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 →
Wallace3220241999
Maplewood2620212000
Packertown 22620252005
Thorntown2320251982
Brookville2320251966
Galveston2220251981
Friendswood2220241986
Columbia Cty2120241981
Lakeville2120241993
Jamestown1920251986
Shelbyville1920251983
Laporte1920241999
Witts Station1920252000
New Castle1820242002
Anderson1820252000
Spencer1720241967
Montpelier1720242018
Monticello1620251981
Portage 21620252005
Kewanna1520221981
Middletown1520251966
Kokomo1520241993
Knox1420251981
Packertown1420041967
Hebron1320251966

Northern House Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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