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

Brown-headed Cowbird In Peninsular Florida

All regionsPeninsular FloridaGeneralists

Brown-headed Cowbird in Peninsular Florida has surged: up 525% on the route-weighted index since 1980.

+525%Since 1980
59Routes In Region
44Years

Notable Signals

long arc increasecomputed index

Brown-headed Cowbird has surged in Peninsular Florida: up 525% on the route-weighted index since 1980.

Forecast

If the recent trend holds, Brown-headed Cowbird in Peninsular Florida is projected to stay roughly flat through 2029, near 0.75 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±194.7%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029
0.75Projected 2029 index
0.00–1.595% range
±194.7%Backtest error
19742029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.730.001.5
20260.740.001.5
20270.740.001.5
20280.740.001.5
20290.750.001.5

Routes In Peninsular Florida

Routes recording Brown-headed Cowbird in Peninsular Florida.
Shawano 2FLORIDA212011
Citrus ParkFLORIDA122024
FlemingtonFLORIDA71999
Punta GordaFLORIDA52014
KissimmeeFLORIDA42003
MicanopyFLORIDA31991
RomeoFLORIDA32024
St AugustineFLORIDA32024
Sunniland GrFLORIDA32021
NobletonFLORIDA32024
ClewistonFLORIDA32023
Mt. OliveFLORIDA32024
Myakka HeadFLORIDA22010
Polk CityFLORIDA22021
ChildsFLORIDA22006
ScottsmoorFLORIDA22024
Pleasant GrFLORIDA22009
KendallFLORIDA21988
PalmdaleFLORIDA22014
Island GroveFLORIDA22018
CrewsvilleFLORIDA22011
Sugarloaf Key 2FLORIDA22015
Merritt IslFLORIDA22003
ChassahowitzFLORIDA22011
Dale MabryFLORIDA11985

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