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

Wilson's Warbler In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Wilson's Warbler in Southern Rockies / Colorado Plateau has increased: up 41% on the route-weighted index since 1970.

+41%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 →

No notable trend signals for Wilson's Warbler in Southern Rockies / Colorado Plateau. See the full index history below.

Wilson's Warbler In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Wilson's Warbler in Southern Rockies / Colorado Plateau is projected to rise about 107% by 2030 — from 0.57 in 2025 to a central estimate of 1.2 (95% range 0.59–1.8). A 5-year backtest shows a typical error of ±66%, with 60% of held-out values landing inside the 95% band.

+107%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 →
1.2Projected 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 →
0.59–1.895% 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 →
±66%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, Wilson's Warbler in Southern Rockies / Colorado Plateau is projected to rise about 107% by 2030 — from 0.57 in 2025 to a central estimate of 1.2 (95% range 0.59–1.8). A 5-year backtest shows a typical error of ±66%, with 60% 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 →
20261.10.551.7
20271.10.561.7
20281.20.571.7
20291.20.581.7
20301.20.591.8

Routes In Southern Rockies / Colorado Plateau

Routes recording Wilson's Warbler 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 →
TincupCOLORADO352025
Guanella PasCOLORADO112025
Weston PassCOLORADO112000
Marshall PasCOLORADO112014
Lost LakeCOLORADO102025
Blackhead PkCOLORADO72021
Comanche PkCOLORADO72024
CortezCOLORADO62005
Stillwater PassCOLORADO62007
Fox ParkWYOMING62025
Rifle FallsCOLORADO52013
Mount EvansCOLORADO52014
CebollaNEW-MEXICO51978
YampaCOLORADO42023
ParlinCOLORADO42025
Buffalo ParkCOLORADO42023
PinonCOLORADO42004
ColonaCOLORADO31981
Red CliffCOLORADO32025
Wet Mtns.COLORADO31997
Groundhog RsCOLORADO32025
Ragged Mtn.COLORADO32019
NuclaCOLORADO32006
Lizard Head PassCOLORADO32024
GardnerCOLORADO32008

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