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

Cerulean Warbler Population Trend in New Jersey

All statesForest birds

Cerulean Warbler in New Jersey has surged: up 222% on the route-weighted index since 1980.

+222%Since 1980
5Routes In State
35Years

Notable Cerulean Warbler Trends in New Jersey

long arc increasecomputed index

Cerulean Warbler has surged in New Jersey: up 222% on the route-weighted index since 1980.

Cerulean Warbler Population Forecast in New Jersey

If the recent trend holds, Cerulean Warbler in New Jersey is projected to rise about 98% by 2029 — from 0.10 in 2024 to a central estimate of 0.19 (95% range 0.03–0.34). A 5-year backtest shows a typical error of ±47.1%, with 80% of held-out values landing inside the 95% band.

+98%Change by 2029
0.19Projected 2029 index
0.03–0.3495% range
±47.1%Backtest error
19782029
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
20250.180.020.34
20260.180.030.34
20270.180.030.34
20280.190.030.34
20290.190.030.34

Cerulean Warbler Survey Routes in New Jersey

Routes recording Cerulean Warbler in New Jersey.
Kemah Lake320141991
High Point220241988
Midvale119791979
Bloomsbury119781978
Dover119801980

Cerulean Warbler Population Trend in Other States

alabamaarkansasconnecticutgeorgiaillinoisindianakentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-yorknorth-carolinaohiooklahomapennsylvaniatennesseevermontvirginiawest-virginiawisconsin

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