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

Northern House Wren Population Trend in Idaho

All statesForest birds

Northern House Wren in Idaho has surged: up 483% on the route-weighted index since 1971.

+483%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 →
54YearsYears 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 483% 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 fall about 27% by 2029 — from 6.0 in 2024 to a central estimate of 4.4 (95% range 2.4–6.4). A 5-year backtest shows a typical error of ±21.7%, with 80% of held-out values landing inside the 95% band.

-27%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 →
4.4Projected 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 →
2.4–6.495% 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 →
±21.7%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 fall about 27% by 2029 — from 6.0 in 2024 to a central estimate of 4.4 (95% range 2.4–6.4). A 5-year backtest shows a typical error of ±21.7%, with 80% of held-out values landing inside the 95% band.19682029
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 →
20254.22.16.2
20264.22.26.2
20274.32.26.3
20284.32.36.3
20294.42.46.4

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 →
Magic Mtn5220241987
Cascade3619841978
Joel2820241989
Squirrel2120241971
Featherville1920241989
Gifford1620171986
Golden1520161987
Cabarton1520231985
Baldy Mountain920162013
Challis820241980
Henry819831978
Silver City720241993
Baker420241985
Pocatello420191980
Preston420161989
Naples320241973
Leadore320221996
Springfield320171969
Pierce319971994
Salmon River320211991
Picabo320182005
Almo320231988
Nezperce220081993
Centerville220191972
Ririe220231985

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 2026-05-22.