BirdAnalyst
Species · New Jersey · BBS 2025 Release · 1966–2024

Prothonotary Warbler Population Trend in New Jersey

All statesForest birds

Prothonotary Warbler in New Jersey has surged: up 465% on the route-weighted index since 1986.

+465%Since 1986
13Routes In State
28Years

Notable Prothonotary Warbler Trends in New Jersey

long arc increasecomputed index

Prothonotary Warbler has surged in New Jersey: up 465% on the route-weighted index since 1986.

Prothonotary Warbler Population Forecast in New Jersey

If the recent trend holds, Prothonotary Warbler in New Jersey is projected to fall about 23% by 2029 — from 0.33 in 2024 to a central estimate of 0.26 (95% range 0.12–0.40). A 5-year backtest shows a typical error of ±36.2%, with 60% of held-out values landing inside the 95% band.

-23%Change by 2029
0.26Projected 2029 index
0.12–0.4095% range
±36.2%Backtest error
19792029
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
20250.240.100.38
20260.240.100.38
20270.250.100.39
20280.250.110.39
20290.260.120.40

Prothonotary Warbler Survey Routes in New Jersey

Routes recording Prothonotary Warbler in New Jersey.
Pomona520241987
Cape May Ch320111993
Estell Manor220222021
Pedricktown220102000
Woodbury Hgt120181986
Six Points120032003
Albion119921992
Bennett Mill119961996
Winslow120241989
Pedricktown 2120182018
Ramseysburg120052005
Friendship120241991
Villas119811979

Prothonotary Warbler Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourinew-yorknorth-carolinaohiooklahomapennsylvaniasouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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