Species · BCR 13 · BBS 2025 Release · 1966–2024

Black-throated Blue Warbler In Lower Great Lakes / St. Lawrence Plain

Black-throated Blue Warbler in Lower Great Lakes / St. Lawrence Plain has fallen sharply: down 60% on the route-weighted index since 1969.

-60%Since 1969
30Routes In Region
55Years

Notable Signals

long arc declinecomputed index

Black-throated Blue Warbler has fallen sharply in Lower Great Lakes / St. Lawrence Plain: down 60% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Black-throated Blue Warbler in Lower Great Lakes / St. Lawrence Plain is projected to stay roughly flat through 2028, near 0.06 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±75.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028
0.06Projected 2028 index
0.000.1895% range
±75.5%Backtest error
19672028
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
20240.070.000.19
20250.060.000.19
20260.060.000.19
20270.060.000.18
20280.060.000.18

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Black-throated Blue Warbler in Lower Great Lakes / St. Lawrence Plain.
ColchesterVERMONT31991
OneidaNEW-YORK21992
SalemNEW-YORK22001
BalmatNEW-YORK22008
North PownalVERMONT22021
ShaftsburyVERMONT22023
HighlandNEW-YORK12008
W ShokanNEW-YORK12018
AusterlitzNEW-YORK11998
CatskillsNEW-YORK11976
Oriskany FlsNEW-YORK12010
RomulusNEW-YORK11968
TrumansburgNEW-YORK11976
BranchportNEW-YORK12011
Canadice LNEW-YORK12019
MendonNEW-YORK11991
Cherry HillNEW-YORK12009
ByronNEW-YORK11977
PulaskiNEW-YORK11979
Alder CreekNEW-YORK11984
N WilmurtNEW-YORK11998
North EastonNEW-YORK12007
WaddingtonNEW-YORK11998
OgdensburgNEW-YORK11996
ParishvilleNEW-YORK12022

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