BirdAnalyst
Species · Maine · BBS 2026 Release · 1966–2025

Common Yellowthroat Population Trend in Maine

All statesForest birds

Common Yellowthroat in Maine has edged down: down 11% on the route-weighted index since 1968.

-11%Since 1968TrendPercent 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 →
78Routes 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 →
59YearsYears 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 MaineNotable 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 Common Yellowthroat in Maine. See the full index history below.

Common Yellowthroat Population Forecast in Maine

If the recent trend holds, Common Yellowthroat in Maine is projected to fall about 11% by 2030 — from 16 in 2025 to a central estimate of 14 (95% range 5.9–23). A 5-year backtest shows a typical error of ±6.3%, with 100% of held-out values landing inside the 95% band.

-11%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 →
14Projected 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 →
5.9–2395% 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 →
±6.3%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 Maine is projected to fall about 11% by 2030 — from 16 in 2025 to a central estimate of 14 (95% range 5.9–23). A 5-year backtest shows a typical error of ±6.3%, with 100% of held-out values landing inside the 95% band.19662030
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 →
2026156.423
2027156.323
2028156.223
2029156.023
2030145.923

Common Yellowthroat Survey Routes in Maine

Routes recording Common Yellowthroat in Maine.
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 →
Northfield5019811976
Harmony4720251967
East Troy4620211972
Brooks4120211977
Hermon4020211966
Hudson4020161973
Washburn3820051979
Ft Fairfield3520051993
Benton3419801971
Cornville3020252012
Deblois2920071966
Manchester2819951971
Ludlow2719981968
Warren2619901973
Forest Sta2620001966
Boundary2520161993
Wytopitlock2420251976
Searsport2420252002
Charleston2320211975
Ashland2220081980
Aurora2120211975
Greenwood2020251966
Benedicta2020221976
Turner1920101972
Jefferson1920101991

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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