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

Northern House Wren Population Trend in Idaho

All statesForest birds

Northern House Wren in Idaho has surged: up 459% on the route-weighted index since 1971.

+459%Since 1971TrendPercent 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 →
52Routes 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 →
55YearsYears 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 IdahoNotable 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 Idaho: up 459% on the route-weighted index since 1971.

Northern House Wren Population Forecast in Idaho

If the recent trend holds, Northern House Wren in Idaho is projected to rise about 72% by 2030 — from 2.5 in 2025 to a central estimate of 4.4 (95% range 2.3–6.5). A 5-year backtest shows a typical error of ±30.5%, with 80% of held-out values landing inside the 95% band.

+72%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 →
4.4Projected 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 →
2.3–6.595% 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 →
±30.5%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 Idaho is projected to rise about 72% by 2030 — from 2.5 in 2025 to a central estimate of 4.4 (95% range 2.3–6.5). A 5-year backtest shows a typical error of ±30.5%, with 80% of held-out values landing inside the 95% band.19682030
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 →
20264.22.16.2
20274.22.16.3
20284.32.26.4
20294.32.26.4
20304.42.36.5

Northern House Wren Survey Routes in Idaho

Routes recording Northern House Wren in Idaho.
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 →
Cascade3619841978
Magic Mtn3420251987
Joel2820241989
Cabarton2620241985
Gifford1620171986
Golden1520161987
Squirrel1520251971
Featherville1220251989
Baldy Mountain920162013
Henry819831978
Dougal Res620251988
Challis520251980
Marble Creek520241992
Almo520251988
Mivoden420241977
Baker420241985
Centerville420251972
Pocatello420191980
Preston420161989
Leadore320221996
Springfield320171969
Pierce319971994
Picabo320182005
Naples220251973
Nezperce220081993

Northern House Wren Population Trend in Other States

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

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