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

Clapper Rail Population Trend in New Jersey

All statesWetland birds

Clapper Rail in New Jersey has surged: up 186% on the route-weighted index since 1981.

+186%Since 1981
3Routes In State
35Years

Notable Clapper Rail Trends in New Jersey

long arc increasecomputed index

Clapper Rail has surged in New Jersey: up 186% on the route-weighted index since 1981.

Clapper Rail Population Forecast in New Jersey

If the recent trend holds, Clapper Rail in New Jersey is projected to stay roughly flat through 2029, near 0.57 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±34%, with 100% of held-out values landing inside the 95% band.

+8%Change by 2029
0.57Projected 2029 index
0.00–1.295% range
±34%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
20250.560.001.2
20260.560.001.2
20270.560.001.2
20280.560.001.2
20290.570.001.2

Clapper Rail Survey Routes in New Jersey

Routes recording Clapper Rail in New Jersey.
Ocean City1120241979
Six Points220191984
Greenwich120011996

Clapper Rail Population Trend in Other States

alabamaconnecticutdelawarefloridageorgialouisianamarylandnew-yorknorth-carolinasouth-carolinatexasvirginia

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