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

Common Yellowthroat Population Trend in Louisiana

All statesForest birds

Common Yellowthroat in Louisiana has held roughly steady: up 3% on the route-weighted index since 1969.

+3%Since 1969TrendPercent 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 →
98Routes 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 →
58YearsYears 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 LouisianaNotable 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 Louisiana. See the full index history below.

Common Yellowthroat Population Forecast in Louisiana

If the recent trend holds, Common Yellowthroat in Louisiana is projected to fall about 17% by 2030 — from 7.7 in 2025 to a central estimate of 6.3 (95% range 2.5–10). A 5-year backtest shows a typical error of ±24.8%, with 100% of held-out values landing inside the 95% band.

-17%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 →
6.3Projected 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 →
2.5–1095% 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 →
±24.8%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 Louisiana is projected to fall about 17% by 2030 — from 7.7 in 2025 to a central estimate of 6.3 (95% range 2.5–10). A 5-year backtest shows a typical error of ±24.8%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20266.52.610
20276.42.610
20286.42.610
20296.42.610
20306.32.510

Common Yellowthroat Survey Routes in Louisiana

Routes recording Common Yellowthroat in Louisiana.
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 →
Ltl Chenier 29720112010
Forked Island 27720112010
Ltl Chenier6820251986
Forked Island5220252008
Carlisle2919881968
Morgan City2620222011
Kraemer2320251997
Sabine Nwr 22320172009
Freetown2220191967
Hackberry 21820252018
Sabine Nwr1520081989
Lacombe1419831967
Derry1419891967
Brousville1420251998
Ivan 21420252014
Atchafalaya1420251989
Cypress1319821967
Mer Rouge1120081967
Esther1120251988
Oakdale1119941991
Franklinton1120252008
Kaplan1020231998
Many919921989
Lafitte819911967
Carterville819921992

Common Yellowthroat Population Trend in Other States

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

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