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

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

All regionsNew England / Mid-Atlantic CoastForest birds

Black-throated Green Warbler in New England / Mid-Atlantic Coast has declined: down 25% on the route-weighted index since 1968.

-25%Since 1968
50Routes In Region
58Years

Notable Signals

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

Forecast

If the recent trend holds, Black-throated Green Warbler in New England / Mid-Atlantic Coast is projected to rise about 164% by 2029 — from 0.10 in 2024 to a central estimate of 0.28 (95% range 0.12–0.44). A 5-year backtest shows a typical error of ±148.1%, with 0% of held-out values landing inside the 95% band.

+164%Change by 2029
0.28Projected 2029 index
0.12–0.4495% range
±148.1%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
20250.270.110.43
20260.270.110.43
20270.280.110.43
20280.280.120.44
20290.280.120.44

Routes In New England / Mid-Atlantic Coast

Routes recording Black-throated Green Warbler in New England / Mid-Atlantic Coast.
WarrenCONNECTICUT192011
Ware RiverMASSACHUSETTS52022
PulaskiRHODE-ISLAND41992
MysticCONNECTICUT22004
ShermanCONNECTICUT22010
PrincetonMASSACHUSETTS21976
BelchertownMASSACHUSETTS22024
N. AndoverMASSACHUSETTS22004
BrentwoodNEW-HAMPSHIRE21996
East KingstonNEW-HAMPSHIRE22017
E HartlandCONNECTICUT11966
BuckinghamCONNECTICUT11984
UncasvilleCONNECTICUT12023
WoodstockCONNECTICUT12007
WestbrookCONNECTICUT11998
WillimanticCONNECTICUT12017
No WoodburyCONNECTICUT12023
GreenwichCONNECTICUT11972
Long HillCONNECTICUT12019
Mid HaddamCONNECTICUT12005
SouthingtonCONNECTICUT12010
Woodstock 2CONNECTICUT12022
Warren 2CONNECTICUT12024
GranbyCONNECTICUT12024
Cape NeddickMAINE12023

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