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

Rock Pigeon Population Trend in Colorado

All statesGeneralists

Rock Pigeon in Colorado has declined: down 35% on the route-weighted index since 1970.

-35%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 →
56YearsYears 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 rise about 12% by 2029 — from 2.1 in 2024 to a central estimate of 2.4 (95% range 0.00–5.0). A 5-year backtest shows a typical error of ±36.5%, with 100% of held-out values landing inside the 95% band.

+12%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 →
2.4Projected 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 →
0.00–5.095% 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 →
±36.5%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 rise about 12% by 2029 — from 2.1 in 2024 to a central estimate of 2.4 (95% range 0.00–5.0). A 5-year backtest shows a typical error of ±36.5%, with 100% of held-out values landing inside the 95% band.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 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 →
20252.40.005.1
20262.40.005.1
20272.40.005.1
20282.40.005.1
20292.40.005.0

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 →
Sheridan Lak6320161997
Fruita4520071988
Edison4320241990
Parlin3019891983
Mesaverde Np3020011996
Julesburg2920211998
Adams Co.2620221989
Cortez2220081988
De Beque2120241995
Rush2020221984
Gilpin1920241971
Flagler1920241997
Villegreen1720171988
Ninaview1720181995
Briggsdale1420241968
Ellicott1420241994
Pritchett1420241995
Moon Pass1420232000
Harmony1120241973
Mosca1120242005
Nunn1120211997
Timpas1120191995
Doyle Bridge 21120211998
Alamosa1020241988
Grover920231992

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 2026-05-22.