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Species · Maine · BBS 2025 Release · 1966–2024

Nashville Warbler Population Trend in Maine

All statesForest birds

Nashville Warbler in Maine has fallen sharply: down 66% on the route-weighted index since 1968.

-66%Since 1968
76Routes In State
58Years

Notable Nashville Warbler Trends in Maine

long arc declinecomputed index

Nashville Warbler has fallen sharply in Maine: down 66% on the route-weighted index since 1968.

Nashville Warbler Population Forecast in Maine

If the recent trend holds, Nashville Warbler in Maine is projected to rise about 242% by 2029 — from 0.79 in 2024 to a central estimate of 2.7 (95% range 0.00–7.7). A 5-year backtest shows a typical error of ±211.5%, with 100% of held-out values landing inside the 95% band.

+242%Change by 2029
2.7Projected 2029 index
0.00–7.795% range
±211.5%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
20252.90.007.9
20262.80.007.8
20272.80.007.8
20282.70.007.7
20292.70.007.7

Nashville Warbler Survey Routes in Maine

Routes recording Nashville Warbler in Maine.
Northfield7719811976
Pillsbury Pd2219681968
Big Twenty 22220092009
Heron Lake1920031983
Big Twenty1820081993
Forest Sta1620001966
Topsfield1519961978
Telos1320041995
Waite1119771977
Seboomook Lk1020141978
Grnd Lk Strm1020001966
Nesowadnehun1020211990
Ashland920081980
Yankeetuladi920091994
Warren819901973
Weeks Brook820161995
Baker Lake820091994
Deblois720071966
Brooks620191977
Cooper620211975
Charleston620191977
Hudson620091974
Ludlow619981968
Horse Mtn620111983
Wilson Mills520241983

Nashville Warbler Population Trend in Other States

californiaconnecticutidahomarylandmassachusettsmichiganminnesotamontananew-hampshirenew-jerseynew-yorknorth-dakotaoregonpennsylvaniarhode-islandvermontvirginiawashingtonwest-virginiawisconsin

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