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

Chimney Swift Population Trend in New Jersey

All statesAerial insectivores

Chimney Swift in New Jersey has held roughly steady: down 6% on the route-weighted index since 1968.

-6%Since 1968
41Routes In State
58Years

Notable Chimney Swift Trends in New Jersey

No notable trend signals for Chimney Swift in New Jersey. See the full index history below.

Chimney Swift Population Forecast in New Jersey

If the recent trend holds, Chimney Swift in New Jersey is projected to stay roughly flat through 2029, near 5.8 (95% range 2.5–9.2). A 5-year backtest shows a typical error of ±19.7%, with 100% of held-out values landing inside the 95% band.

+4%Change by 2029
5.8Projected 2029 index
2.5–9.295% range
±19.7%Backtest error
19662029
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
20256.02.79.4
20266.02.69.3
20275.92.69.3
20285.92.59.2
20295.82.59.2

Chimney Swift Survey Routes in New Jersey

Routes recording Chimney Swift in New Jersey.
Deepwater4319771969
Hope3919941970
Bloomsbury3820241969
Del Haven3119911991
Midvale2920221967
Pedricktown2720121991
Greenwich1920241966
Cape May Ch1820131992
Bennett Mill 21520242016
Dover1220231977
Croton1120071970
Mt Misery1119881976
Keyport1020221990
Albion820221966
Woodbury Hgt720241967
Pedricktown 2720242013
Sandbrook620241969
Kemah Lake620241966
Pomona520241978
Toms River420241966
Masonville419701966
Holmansville420091969
Clarksville419911969
Cranbury420241987
Villas419811979

Chimney Swift Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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