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

Northern House Wren Population Trend in California

All statesForest birds

Northern House Wren in California has edged up: up 24% on the route-weighted index since 1970.

+24%Since 1970
208Routes In State
56Years

Notable Northern House Wren Trends in California

No notable trend signals for Northern House Wren in California. See the full index history below.

Northern House Wren Population Forecast in California

If the recent trend holds, Northern House Wren in California is projected to stay roughly flat through 2029, near 3.9 (95% range 1.6–6.2). A 5-year backtest shows a typical error of ±48.3%, with 100% of held-out values landing inside the 95% band.

+4%Change by 2029
3.9Projected 2029 index
1.6–6.295% range
±48.3%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
20253.91.56.2
20263.91.56.2
20273.91.56.2
20283.91.56.2
20293.91.66.2

Northern House Wren Survey Routes in California

Routes recording Northern House Wren in California.
White River8019921972
Cal Hot Spgs6720191993
Carmel Val3520241973
Lockwood3520241972
Iron Gate3320191988
El Toro3219991973
Yokohl Val2919971973
Santa Ynez2820191969
Lake Success2819961972
Mesa Grande2820241970
Cuyamaca Pk2720241970
Jackson2119921972
Poway2019801973
Crowder Flat1920192002
Fallsvale1819811970
Cleveland Nf1720181994
Harbor Lake 21720242016
Elsinore Mtn1620241970
Cp. Pendleton1520031971
Macdoel1520191973
Lake Berryessa1420242023
Genesee1420241972
Foster Park1319941968
Mt Baldy1320241970
Horse Creek1220191970

Northern House Wren Population Trend in Other States

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

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