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

Common Yellowthroat In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Common Yellowthroat in Southern Rockies / Colorado Plateau has surged: up 339% on the route-weighted index since 1970.

+339%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 →
104Routes 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Common Yellowthroat has surged in Southern Rockies / Colorado Plateau: up 339% on the route-weighted index since 1970.

Common Yellowthroat In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Common Yellowthroat in Southern Rockies / Colorado Plateau is projected to fall about 16% by 2029 — from 0.34 in 2024 to a central estimate of 0.29 (95% range 0.06–0.52). A 5-year backtest shows a typical error of ±18.9%, with 100% of held-out values landing inside the 95% band.

-16%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 →
0.29Projected 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 →
0.06–0.5295% 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 →
±18.9%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, Common Yellowthroat in Southern Rockies / Colorado Plateau is projected to fall about 16% by 2029 — from 0.34 in 2024 to a central estimate of 0.29 (95% range 0.06–0.52). A 5-year backtest shows a typical error of ±18.9%, 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 →
20250.280.050.51
20260.280.050.51
20270.280.050.51
20280.280.060.51
20290.290.060.52

Routes In Southern Rockies / Colorado Plateau

Routes recording Common Yellowthroat 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 →
Blackhead PkCOLORADO212021
BufordCOLORADO62024
FalfaCOLORADO62024
Angel FireNEW-MEXICO51996
Fletcher PkWYOMING52016
Ryan ParkWYOMING52012
AngoraCOLORADO42024
MoabUTAH42023
YampaCOLORADO32023
Douglas PassCOLORADO32024
AlamosaCOLORADO32024
SummitvilleCOLORADO32000
PaoniaCOLORADO32024
CokedaleCOLORADO32024
Yellowjacket PassCOLORADO32024
Cortez 2COLORADO32017
HatchUTAH32023
Sybille CynWYOMING32024
DoloresCOLORADO21982
Wilson CreekCOLORADO22015
Red CliffCOLORADO22016
TarryallCOLORADO22018
FlattopsCOLORADO22006
PiedraCOLORADO22022
PowderhornCOLORADO22008

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