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

Northern House Wren Population Trend in Washington

All statesForest birds

Northern House Wren in Washington has surged: up 222% on the route-weighted index since 1970.

+222%Since 1970
81Routes In State
56Years

Notable Northern House Wren Trends in Washington

long arc increasecomputed index

Northern House Wren has surged in Washington: up 222% on the route-weighted index since 1970.

Northern House Wren Population Forecast in Washington

If the recent trend holds, Northern House Wren in Washington is projected to rise about 20% by 2029 — from 4.5 in 2024 to a central estimate of 5.4 (95% range 3.8–6.9). A 5-year backtest shows a typical error of ±49.2%, with 40% of held-out values landing inside the 95% band.

+20%Change by 2029
5.4Projected 2029 index
3.8–6.995% range
±49.2%Backtest error
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 index95% low95% high
20255.13.56.7
20265.23.66.7
20275.23.76.8
20285.33.76.9
20295.43.86.9

Northern House Wren Survey Routes in Washington

Routes recording Northern House Wren in Washington.
Twisp4020241969
Turnbull Nwr3520231993
Ewan3420191983
Ellensburg2920241981
Lake Chelan2520241988
E. Mt. Adams2120241995
Pomeroy1820241992
Reardan1420241968
Leavenworth1220241984
Yakima1220241993
Snowden1120241971
Waitsburg1120041994
Chewelah1020211977
Deer Park1020151994
Mcchord1020151996
Rainier920191993
Malden820241998
L. Wenatchee820241993
Nighthawk720241992
Tonasket620181982
Blewett Pass620241992
Laurier620221997
Ewan 2620242023
Cougar520231990
Wilbur520241983

Northern House Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.