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

Veery Population Trend in Colorado

All statesForest birds

Veery in Colorado has collapsed: down 87% on the route-weighted index since 1970.

-87%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 →
18Routes 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 →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Veery 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 →

long arc declinecomputed 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 →

Veery has collapsed in Colorado: down 87% on the route-weighted index since 1970.

Veery Population Forecast in Colorado

If the recent trend holds, Veery in Colorado is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±195.1%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.00Projected 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 →
0.00–0.2195% 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 →
±195.1%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, Veery in Colorado is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±195.1%, 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 →
20250.000.000.21
20260.000.000.21
20270.000.000.21
20280.000.000.21
20290.000.000.21

Veery Survey Routes in Colorado

Routes recording Veery 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 →
Yampa1020231969
Cheesman Lk219991995
Castleton219921992
Alamosa219881988
Como220231998
Lost Lake120241993
South Fork120011999
Mount Evans120122005
Buford119891973
Delta119921992
Doyleville120222007
Parlin120121968
Flattops120112011
Guanella Pas120242016
Dolores Riv119881988
Comanche Pk119961996
Ragged Mtn.119961996
Groundhog Rs119941994

Veery Population Trend in Other States

alabamaalaskaconnecticutdelawaregeorgiaidahoillinoisindianakentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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