BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Song Sparrow In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Song Sparrow in Southern Rockies / Colorado Plateau has held roughly steady: up 0% on the route-weighted index since 1970.

+0%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 →
171Routes In RegionSurvey 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 SignalsNotable 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 Song Sparrow in Southern Rockies / Colorado Plateau. See the full index history below.

Song Sparrow In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Song Sparrow in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 2.9 (95% range 1.6–4.2). A 5-year backtest shows a typical error of ±8.1%, with 100% of held-out values landing inside the 95% band.

+4%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 →
2.9Projected 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 →
1.6–4.295% 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 →
±8.1%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, Song Sparrow in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 2.9 (95% range 1.6–4.2). A 5-year backtest shows a typical error of ±8.1%, 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 →
20252.91.64.2
20262.91.64.2
20272.91.64.2
20282.91.64.2
20292.91.64.2

Routes In Southern Rockies / Colorado Plateau

Routes recording Song Sparrow in Southern Rockies / Colorado Plateau.
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 →
YampaCOLORADO432023
AspenCOLORADO342024
Yellowjacket PassCOLORADO232024
Stillwater Pass 2COLORADO212024
Ant Flat-Ogden CanUTAH202023
HeeneyCOLORADO182019
Fox CreekCOLORADO172024
Moon PassCOLORADO172024
HannaUTAH172024
Lost Cr. ResUTAH172018
Red CliffCOLORADO142024
Rifle FallsCOLORADO142021
BufordCOLORADO132024
CastletonCOLORADO122024
Ojo SarcoNEW-MEXICO112024
Logan CanyonUTAH112019
ParlinCOLORADO102023
Castle DaleUTAH102015
Wilson CreekCOLORADO92024
Rio Grnds RsCOLORADO92024
Stillwater PassCOLORADO92009
SoapstoneUTAH92022
Dixie NfUTAH92024
Dolores RivCOLORADO82024
AlamosaCOLORADO82024

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