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

Northern House Wren Population Trend in Maryland

All statesForest birds

Northern House Wren in Maryland has edged up: up 20% on the route-weighted index since 1968.

+20%Since 1968
75Routes In State
58Years

Notable Northern House Wren Trends in Maryland

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

Northern House Wren Population Forecast in Maryland

If the recent trend holds, Northern House Wren in Maryland is projected to stay roughly flat through 2029, near 9.5 (95% range 7.6–11). A 5-year backtest shows a typical error of ±11.6%, with 80% of held-out values landing inside the 95% band.

+4%Change by 2029
9.5Projected 2029 index
7.6–1195% range
±11.6%Backtest error
19662029
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
20259.47.511
20269.47.511
20279.57.511
20289.57.611
20299.57.611

Northern House Wren Survey Routes in Maryland

Routes recording Northern House Wren in Maryland.
Emmitsburg5220241966
Wheaton4220241990
Earlton3120242014
Eklo3020181966
Olney2720241966
Madonna2620222009
Williamsport2520241966
Jennings2520241995
Madison2120241966
Warfieldsbrg2020241966
Finzel2020241995
Randallstown1820131966
Ijamsville1720241986
Smithsburg1520141966
Fair Hill1519961992
Mt Nebo1319911969
Silver Spg1319891966
Walnut1320241999
Pleasant Val1220241966
Van Bibber1120131966
Norwood1020121966
Bachman Mill1020241966
Accident 21020242018
Wolfsville920241966
La Plata920091966

Northern House Wren Population Trend in Other States

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

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