BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Gambel's Quail In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGame birds

Gambel's Quail in Southern Rockies / Colorado Plateau has edged up: up 25% on the route-weighted index since 1970.

+25%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 →
41Routes 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 Gambel's Quail in Southern Rockies / Colorado Plateau. See the full index history below.

Gambel's Quail In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Gambel's Quail in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 0.58 (95% range 0.10–1.1). A 5-year backtest shows a typical error of ±58%, with 100% of held-out values landing inside the 95% band.

-5%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 →
0.58Projected 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 →
0.10–1.195% 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 →
±58%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, Gambel's Quail in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 0.58 (95% range 0.10–1.1). A 5-year backtest shows a typical error of ±58%, 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 →
20260.570.101.1
20270.570.101.1
20280.570.101.1
20290.580.101.1
20300.580.101.1

Routes In Southern Rockies / Colorado Plateau

Routes recording Gambel's Quail 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 →
AztecNEW-MEXICO361989
FarmingtonNEW-MEXICO311987
ToroweapARIZONA232025
HatchUTAH232025
La PlataNEW-MEXICO212013
La Plata 2NEW-MEXICO152016
RosevaleCOLORADO132025
AnethUTAH122025
FruitaCOLORADO82003
Horse MtnNEW-MEXICO82024
The GapARIZONA51968
Peach SpringARIZONA52025
ShivwitzUTAH52025
SanosteeNEW-MEXICO42023
BoulderUTAH31990
BlandingUTAH32025
MonticelloUTAH32025
Navajo TrailARIZONA22025
Douglas PassCOLORADO22024
Willow PeakCOLORADO21992
Animas 2COLORADO22015
ValenciaNEW-MEXICO21991
Cerro VerdeNEW-MEXICO21985
Moquith MtnUTAH22024
Wellington 2UTAH22003

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