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

Brown Creeper Population Trend in Utah

All statesForest birds

Brown Creeper in Utah has declined: down 50% on the route-weighted index since 1990.

-50%Since 1990TrendPercent 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 →
18Routes 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 →
32YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Brown Creeper Trends in UtahNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Brown Creeper in Utah. See the full index history below.

Brown Creeper Population Forecast in Utah

If the recent trend holds, Brown Creeper in Utah is projected to fall about 44% by 2029 — from 0.07 in 2024 to a central estimate of 0.04 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±59.7%, with 80% of held-out values landing inside the 95% band.

-44%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 →
0.04Projected 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 →
0.00–0.1195% 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 →
±59.7%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, Brown Creeper in Utah is projected to fall about 44% by 2029 — from 0.07 in 2024 to a central estimate of 0.04 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±59.7%, with 80% of held-out values landing inside the 95% band.19882029
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 →
20250.040.000.11
20260.040.000.11
20270.040.000.11
20280.040.000.11
20290.040.000.11

Brown Creeper Survey Routes in Utah

Routes recording Brown Creeper in Utah.
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 →
Wasatch Nf420192003
Alton220011997
La Sal 3220242008
Moon Lake 2120222006
Gooseberry120022002
Lost Cr. Res120121995
Grizzly Rdge120221996
Dixie Nf120241993
Hardware Ranch120052005
La Sal 2120062004
Beck 2120052005
Beaver120021992
Heber Mtn.120241997
Red Spur Mtn.120231998
Fish Lake Nf119941994
Navajo Lake120091988
Bryce Canyon120191990
Soapstone120181999

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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