BirdAnalyst
Species · BCR 31 · BBS 2025 Release · 1966–2024

Yellow Warbler In Peninsular Florida

All regionsPeninsular FloridaForest birds

Yellow Warbler in Peninsular Florida has fallen sharply: down 73% on the route-weighted index since 1971.

-73%Since 1971TrendPercent 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 →
7Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
19YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 →

Yellow Warbler has fallen sharply in Peninsular Florida: down 73% on the route-weighted index since 1971.

Yellow Warbler In Peninsular Florida Population Forecast

If the recent trend holds, Yellow Warbler in Peninsular Florida is projected to stay roughly flat through 2026, near 0.00 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±23.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2026TrendPercent 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 2026 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0795% 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 →
±23.3%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, Yellow Warbler in Peninsular Florida is projected to stay roughly flat through 2026, near 0.00 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±23.3%, with 100% of held-out values landing inside the 95% band.19662026
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 →
20220.010.000.08
20230.010.000.07
20240.010.000.07
20250.010.000.07
20260.000.000.07

Routes In Peninsular Florida

Routes recording Yellow Warbler in Peninsular Florida.
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 →
San AntonioFLORIDA21985
Plantation KFLORIDA11979
AndytownFLORIDA11978
Key LargoFLORIDA11991
Card SoundFLORIDA12021
Sugarloaf KeyFLORIDA11999
Sugarloaf Key 2FLORIDA12013

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