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

Bobolink In Lower Great Lakes / St. Lawrence Plain

All regionsLower Great Lakes / St. Lawrence PlainGrassland birds

Bobolink in Lower Great Lakes / St. Lawrence Plain has fallen sharply: down 66% on the route-weighted index since 1968.

-66%Since 1968
86Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Bobolink has fallen sharply in Lower Great Lakes / St. Lawrence Plain: down 66% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Bobolink in Lower Great Lakes / St. Lawrence Plain is projected to rise about 13% by 2029 — from 3.8 in 2024 to a central estimate of 4.3 (95% range 0.00–9.0). A 5-year backtest shows a typical error of ±42.4%, with 100% of held-out values landing inside the 95% band.

+13%Change by 2029
4.3Projected 2029 index
0.00–9.095% range
±42.4%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
20255.10.399.8
20264.90.199.6
20274.70.009.4
20284.50.009.2
20294.30.009.0

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Bobolink in Lower Great Lakes / St. Lawrence Plain.
West BangorNEW-YORK791999
NashvilleNEW-YORK342018
DuanesburgNEW-YORK272024
WatertownNEW-YORK272012
WaddingtonNEW-YORK271998
WaylandOHIO232017
Cherry HillNEW-YORK202019
NaplesNEW-YORK152024
BranchportNEW-YORK142024
RandolphNEW-YORK132018
E YoungstownNEW-YORK132023
OneidaNEW-YORK132010
RomulusNEW-YORK122000
FowlerNEW-YORK121968
EllenburgNEW-YORK112006
N WilmurtNEW-YORK101998
PhiladelphiaNEW-YORK102024
N VictoryNEW-YORK101972
Ballston LkNEW-YORK91995
OgdensburgNEW-YORK92024
AkeleyPENNSYLVANIA91979
MendonNEW-YORK82024
SheridanNEW-YORK82024
GarrettsvileOHIO81991
Valley CityOHIO82017

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