BirdAnalyst
Species · Colorado · BBS 2026 Release · 1966–2025

American Pipit Population Trend in Colorado

All statesGrassland birds

American Pipit in Colorado has surged: up 221% on the route-weighted index since 1991.

+221%Since 1991TrendPercent 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 →
16Routes 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 →
35YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Pipit Trends in ColoradoNotable 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 American Pipit in Colorado. See the full index history below.

American Pipit Population Forecast in Colorado

If the recent trend holds, American Pipit in Colorado is projected to stay roughly flat through 2030, near 0.18 (95% range 0.00–0.57). A 5-year backtest shows a typical error of ±183.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2030TrendPercent 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 →
0.18Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.5795% 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 →
±183.7%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, American Pipit in Colorado is projected to stay roughly flat through 2030, near 0.18 (95% range 0.00–0.57). A 5-year backtest shows a typical error of ±183.7%, with 100% of held-out values landing inside the 95% band.19862030
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 →
20260.190.000.58
20270.190.000.58
20280.190.000.58
20290.190.000.57
20300.180.000.57

American Pipit Survey Routes in Colorado

Routes recording American Pipit in Colorado.
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 →
Lake City1920031997
Mount Evans1820241996
Trail Ridge Road1520142003
Gold Hill919981998
Willow Peak320251990
Thomasville219931993
Como220142014
Tincup219991999
Marshall Pas220032003
Red Cliff120071991
Rollins Pass120031998
Uncompahgre120162016
Weston Pass 2120252005
Parlin119861986
Guanella Pas120162016
Summitville120251992

American Pipit Population Trend in Other States

alaskacaliforniamontananew-mexicooregonutahwashingtonwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.