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Species · Washington · BBS 2025 Release · 1966–2024

Hutton's Vireo Population Trend in Washington

All statesForest birds

Hutton's Vireo in Washington has risen sharply: up 56% on the route-weighted index since 1972.

+56%Since 1972TrendPercent 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 →
39Routes 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 →
53YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hutton's Vireo Trends in WashingtonNotable 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 →

Hutton's Vireo has risen sharply in Washington: up 56% on the route-weighted index since 1972.

Hutton's Vireo Population Forecast in Washington

If the recent trend holds, Hutton's Vireo in Washington is projected to rise about 60% by 2029 — from 0.21 in 2024 to a central estimate of 0.34 (95% range 0.08–0.60). A 5-year backtest shows a typical error of ±38.7%, with 100% of held-out values landing inside the 95% band.

+60%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 →
0.34Projected 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 →
0.08–0.6095% 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 →
±38.7%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, Hutton's Vireo in Washington is projected to rise about 60% by 2029 — from 0.21 in 2024 to a central estimate of 0.34 (95% range 0.08–0.60). A 5-year backtest shows a typical error of ±38.7%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.340.080.60
20260.340.080.60
20270.340.080.60
20280.340.080.60
20290.340.080.60

Hutton's Vireo Survey Routes in Washington

Routes recording Hutton's Vireo in Washington.
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 →
Ozette420241971
Mendota 2419961992
Raymond320191993
Kamilche220241978
Deception219981997
Cougar220231973
Neilton219751975
Ilwaco220221977
Suiattle Riv220172005
Pe Ell220231993
Greenwater220182016
Mendota 3220232005
Port Angeles120241971
Warm Beach120011972
Newhalem120191975
Montesand120231992
Taholah120211975
Issaquah119871969
Vashon Is.120241997
E. Mt. Adams120102003
Mcchord120141996
Bunker Hill120182004
Snowden120182018
Kendall120211981
Raymond 2120242022

Hutton's Vireo Population Trend in Other States

arizonacalifornianew-mexicooregontexas

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