BirdAnalyst
Species · BCR 31 · BBS 2026 Release · 1966–2025

Anhinga In Peninsular Florida

All regionsPeninsular FloridaWetland birds

Anhinga in Peninsular Florida has held roughly steady: down 9% on the route-weighted index since 1968.

-9%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 →
71Routes 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 →
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 SignalsNotable 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 Anhinga in Peninsular Florida. See the full index history below.

Anhinga In Peninsular Florida Population Forecast

If the recent trend holds, Anhinga in Peninsular Florida is projected to rise about 28% by 2030 — from 1.3 in 2025 to a central estimate of 1.6 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±88.2%, with 100% of held-out values landing inside the 95% band.

+28%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 →
1.6Projected 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 →
0.00–3.595% 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 →
±88.2%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, Anhinga in Peninsular Florida is projected to rise about 28% by 2030 — from 1.3 in 2025 to a central estimate of 1.6 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±88.2%, 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 →
20261.60.003.6
20271.60.003.5
20281.60.003.5
20291.60.003.5
20301.60.003.5

Routes In Peninsular Florida

Routes recording Anhinga 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 →
ShawanoFLORIDA682002
Wildernes PkFLORIDA192014
Mabel 2FLORIDA132025
Shawano 2FLORIDA122011
Winter GardnFLORIDA102019
St LucieFLORIDA72025
Boca RatonFLORIDA61994
AndytownFLORIDA61998
DeanvilleFLORIDA62019
SandyFLORIDA62015
Merritt IslFLORIDA62006
Dale MabryFLORIDA51987
DavieFLORIDA52017
AripekaFLORIDA52025
Citrus ParkFLORIDA52025
Babcock RnchFLORIDA51989
MicanopyFLORIDA41978
RomeoFLORIDA42023
PinecrestFLORIDA32025
Ft MccoyFLORIDA32003
ClewistonFLORIDA32023
WebbFLORIDA32024
Ridge HarborFLORIDA32025
BelmoreFLORIDA22022
Polk CityFLORIDA22025

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