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

Common Yellowthroat Population Trend in Washington

All statesForest birds

Common Yellowthroat in Washington has surged: up 269% on the route-weighted index since 1970.

+269%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 →
83Routes 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 →
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 Common Yellowthroat 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 →

Common Yellowthroat has surged in Washington: up 269% on the route-weighted index since 1970.

Common Yellowthroat Population Forecast in Washington

If the recent trend holds, Common Yellowthroat in Washington is projected to stay roughly flat through 2029, near 4.4 (95% range 3.2–5.5). A 5-year backtest shows a typical error of ±16.7%, with 80% of held-out values landing inside the 95% band.

-5%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 →
4.4Projected 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 →
3.2–5.595% 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 →
±16.7%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, Common Yellowthroat in Washington is projected to stay roughly flat through 2029, near 4.4 (95% range 3.2–5.5). A 5-year backtest shows a typical error of ±16.7%, with 80% 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 →
20254.13.05.3
20264.23.05.3
20274.23.15.4
20284.33.15.5
20294.43.25.5

Common Yellowthroat Survey Routes in Washington

Routes recording Common Yellowthroat 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 →
Carnation4420241988
South Elma3420241975
Pe Ell3220231993
Everett2320241975
Mendota 32020242005
Bunker Hill1920241968
Raymond 21820242022
Mendota1619881977
Raymond1620211993
Malden1520241998
Montesand1520241986
Mendota 21520001989
Mukilteo1320241993
Mcchord1320151996
Warm Beach1220171968
Ozette1020241973
Camas820091981
Reardan720241969
Bay View620171993
Warm Beach 2620242018
Issaquah519871970
Kendall520241981
Nighthawk520241993
Scootney Reservoir520222009
Chewelah420211977

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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