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

Bewick's Wren Population Trend in Colorado

All statesForest birds

Bewick's Wren in Colorado has surged: up 92% on the route-weighted index since 1973.

+92%Since 1973
57Routes In State
53Years

Notable Bewick's Wren Trends in Colorado

long arc increasecomputed index

Bewick's Wren has surged in Colorado: up 92% on the route-weighted index since 1973.

Bewick's Wren Population Forecast in Colorado

If the recent trend holds, Bewick's Wren in Colorado is projected to rise about 27% by 2029 — from 0.48 in 2024 to a central estimate of 0.61 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±53.4%, with 100% of held-out values landing inside the 95% band.

+27%Change by 2029
0.61Projected 2029 index
0.00–1.595% range
±53.4%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
20250.610.001.5
20260.610.001.5
20270.610.001.5
20280.610.001.5
20290.610.001.5

Bewick's Wren Survey Routes in Colorado

Routes recording Bewick's Wren in Colorado.
Moffat4619871981
Animas1120001996
Delta820211973
Blackhead Pk820192019
Maybell620241973
Walsenburg620242019
Rosevale520242009
Angora520241998
Dolores419791968
Lay420241997
Browns Park420241992
Harmony319761973
Rifle Falls320171999
Gardner320071998
Mesaverde Np220241996
Mica Butte219781975
Wray Gulch220231988
Animas 2220182017
Dolores Riv219881988
Piedra219931992
Cokedale220241995
Nucla220221999
Owl Creek Pass220012001
Haycamp Mesa220042002
Black Sulphur Cr220242023

Bewick's Wren Population Trend in Other States

alabamaarizonaarkansascaliforniaidahoillinoisindianaiowakansaskentuckymarylandmississippimissourinevadanew-mexiconorth-carolinaohiooklahomaoregonpennsylvaniatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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