BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Black-throated Blue Warbler In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastForest birds

Black-throated Blue Warbler in New England / Mid-Atlantic Coast has increased: up 42% on the route-weighted index since 1968.

+42%Since 1968
28Routes In Region
57Years

Notable Signals

No notable trend signals for Black-throated Blue Warbler in New England / Mid-Atlantic Coast. See the full index history below.

Forecast

If the recent trend holds, Black-throated Blue Warbler in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 0.12 (95% range 0.04–0.20). A 5-year backtest shows a typical error of ±97.6%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029
0.12Projected 2029 index
0.04–0.2095% range
±97.6%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
20250.120.040.20
20260.120.040.20
20270.120.040.20
20280.120.040.20
20290.120.040.20

Routes In New England / Mid-Atlantic Coast

Routes recording Black-throated Blue Warbler in New England / Mid-Atlantic Coast.
WarrenCONNECTICUT42011
Ware RiverMASSACHUSETTS32022
E HartlandCONNECTICUT21985
WoodstockCONNECTICUT21994
ShermanCONNECTICUT22019
Mid HaddamCONNECTICUT21973
WestbrookCONNECTICUT11970
No WoodburyCONNECTICUT12015
GreenwichCONNECTICUT12009
Long HillCONNECTICUT11984
SouthingtonCONNECTICUT12016
Woodstock 2CONNECTICUT12023
Warren 2CONNECTICUT12024
GranbyCONNECTICUT12023
MaynardMASSACHUSETTS11970
PrincetonMASSACHUSETTS11974
E PepperellMASSACHUSETTS11970
BelchertownMASSACHUSETTS12024
S BarreMASSACHUSETTS12022
HoldenMASSACHUSETTS12008
Warren 2MASSACHUSETTS12017
BrentwoodNEW-HAMPSHIRE11984
DoverNEW-HAMPSHIRE11973
EpsomNEW-HAMPSHIRE12017
StraffordNEW-HAMPSHIRE12022

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