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Species · Massachusetts · BBS 2025 Release · 1966–2024

Blue-winged Warbler Population Trend in Massachusetts

All statesForest birds

Blue-winged Warbler in Massachusetts has edged down: down 10% on the route-weighted index since 1969.

-10%Since 1969
26Routes In State
57Years

Notable Blue-winged Warbler Trends in Massachusetts

No notable trend signals for Blue-winged Warbler in Massachusetts. See the full index history below.

Blue-winged Warbler Population Forecast in Massachusetts

If the recent trend holds, Blue-winged Warbler in Massachusetts is projected to stay roughly flat through 2029, near 0.56 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±37%, with 100% of held-out values landing inside the 95% band.

-6%Change by 2029
0.56Projected 2029 index
0.00–1.495% range
±37%Backtest error
19672029
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
20250.600.001.4
20260.590.001.4
20270.580.001.4
20280.570.001.4
20290.560.001.4

Blue-winged Warbler Survey Routes in Massachusetts

Routes recording Blue-winged Warbler in Massachusetts.
S Barre320241969
Prattville220191970
Belchertown220241967
E Dennis119941977
Chilmark119811973
Marion120241969
Ware River120221993
Newburyport120061978
Maynard120001988
Littleton120071975
N Oxford120191974
Mansfield120161971
E Pepperell119891984
Warren120091968
N Orange119991970
Cummington119971973
Chesterfield119961976
Cheshire119911971
Pittsfield120061990
Sheffield120131969
Monterey120242023
Gay Head120212001
Holden120211979
N. Andover120241995
Warren 2120242010

Blue-winged Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawaregeorgiaillinoisindianaiowakentuckymarylandmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandtennesseevermontvirginiawest-virginiawisconsin

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