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

Cerulean Warbler In Lower Great Lakes / St. Lawrence Plain

Cerulean Warbler in Lower Great Lakes / St. Lawrence Plain has fallen sharply: down 59% on the route-weighted index since 1968.

-59%Since 1968
38Routes In Region
57Years

Notable Signals

long arc declinecomputed index

Cerulean Warbler has fallen sharply in Lower Great Lakes / St. Lawrence Plain: down 59% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Cerulean Warbler in Lower Great Lakes / St. Lawrence Plain is projected to stay roughly flat through 2029, near 0.06 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±118.9%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.06Projected 2029 index
0.000.1895% range
±118.9%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
20250.070.000.18
20260.070.000.18
20270.060.000.18
20280.060.000.18
20290.060.000.18

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Cerulean Warbler in Lower Great Lakes / St. Lawrence Plain.
CatskillsNEW-YORK21995
ChurchvilleNEW-YORK22006
N VictoryNEW-YORK21971
GarrettsvileOHIO21991
StrongsvilleOHIO21987
HighlandNEW-YORK11984
W ShokanNEW-YORK12001
GhentNEW-YORK12008
RomulusNEW-YORK11989
MacdougallNEW-YORK12004
Canadice LNEW-YORK12004
Cherry HillNEW-YORK11988
E YoungstownNEW-YORK12019
ByronNEW-YORK11989
N Victory 2NEW-YORK12008
Cicero CtrNEW-YORK11987
Alder CreekNEW-YORK11987
N WilmurtNEW-YORK11991
ClintonNEW-YORK11987
NaplesNEW-YORK11981
PhiladelphiaNEW-YORK12024
PittsfieldOHIO12022
WaylandOHIO12009
MiddlefieldOHIO11988
LenoxOHIO12015

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