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

Rock Pigeon Population Trend in Colorado

All statesGeneralists

Rock Pigeon in Colorado has edged down: down 17% on the route-weighted index since 1970.

-17%Since 1970TrendPercent 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 →
93Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Rock Pigeon 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 Rock Pigeon in Colorado. See the full index history below.

Rock Pigeon Population Forecast in Colorado

If the recent trend holds, Rock Pigeon in Colorado is projected to fall about 19% by 2030 — from 3.0 in 2025 to a central estimate of 2.4 (95% range 0.00–5.1). A 5-year backtest shows a typical error of ±33.8%, with 100% of held-out values landing inside the 95% band.

-19%Change 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 →
2.4Projected 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 →
0.00–5.195% 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 →
±33.8%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, Rock Pigeon in Colorado is projected to fall about 19% by 2030 — from 3.0 in 2025 to a central estimate of 2.4 (95% range 0.00–5.1). A 5-year backtest shows a typical error of ±33.8%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20262.50.005.1
20272.50.005.1
20282.50.005.1
20292.40.005.1
20302.40.005.1

Rock Pigeon Survey Routes in Colorado

Routes recording Rock Pigeon 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 →
Flagler13920251997
Sheridan Lak6320161997
Fruita4520071988
Parlin3019891983
Mesaverde Np3020011996
Julesburg2920211998
Ellicott2720251994
Adams Co.2620221989
Gilpin2320251971
Cortez2220081988
De Beque2020241995
Two Buttes1720251973
Villegreen1720171988
Ninaview1720181995
Edison1620251990
Pritchett1520251995
Briggsdale1420241968
Mosca1420252005
Moon Pass1220252000
Harmony1120251973
Rush920251984
Grover920231992
Edler820231992
Bennett820251995
Cortez 2820162009

Rock Pigeon Population Trend in Other States

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

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