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

Black-whiskered Vireo In Peninsular Florida

All regionsPeninsular FloridaForest birds

Black-whiskered Vireo in Peninsular Florida has collapsed: down 85% on the route-weighted index since 1968.

-85%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 →
17Routes 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 →
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 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 →

Black-whiskered Vireo has collapsed in Peninsular Florida: down 85% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Black-whiskered Vireo in Peninsular Florida is projected to stay roughly flat through 2029, near 0.49 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±795.6%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.49Projected 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 →
0.00–1.595% 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 →
±795.6%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, Black-whiskered Vireo in Peninsular Florida is projected to stay roughly flat through 2029, near 0.49 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±795.6%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.530.001.5
20260.520.001.5
20270.510.001.5
20280.500.001.5
20290.490.001.5

Routes In Peninsular Florida

Routes recording Black-whiskered Vireo 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 →
Key LargoFLORIDA501991
Key WestFLORIDA391987
Sugarloaf KeyFLORIDA262004
Card SoundFLORIDA62021
Vero BeachFLORIDA52001
Sugarloaf Key 2FLORIDA52021
Plantation KFLORIDA42004
RedlandsFLORIDA22019
BrowardFLORIDA11968
Boca RatonFLORIDA11983
SebastianFLORIDA11989
HomesteadFLORIDA12013
Weaver StnFLORIDA12019
Punta GordaFLORIDA11995
FlamingoFLORIDA12019
PinelandsFLORIDA12024
Holey LandFLORIDA12013

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