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

Common Loon In Lower Great Lakes / St. Lawrence Plain

All regionsLower Great Lakes / St. Lawrence PlainWetland birds

Common Loon in Lower Great Lakes / St. Lawrence Plain has increased: up 38% on the route-weighted index since 1983.

+38%Since 1983
7Routes In Region
21Years

Notable Signals

No notable trend signals for Common Loon in Lower Great Lakes / St. Lawrence Plain. See the full index history below.

Forecast

If the recent trend holds, Common Loon in Lower Great Lakes / St. Lawrence Plain is projected to fall about 40% by 2029 — from 0.06 in 2024 to a central estimate of 0.04 (95% range 0.01–0.07). A 5-year backtest shows a typical error of ±52.3%, with 100% of held-out values landing inside the 95% band.

-40%Change by 2029
0.04Projected 2029 index
0.01–0.0795% range
±52.3%Backtest error
19692029
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
20250.040.010.06
20260.040.010.06
20270.040.010.06
20280.040.010.06
20290.040.010.07

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Common Loon in Lower Great Lakes / St. Lawrence Plain.
MacdougallNEW-YORK11999
PulaskiNEW-YORK12023
OgdensburgNEW-YORK11989
ParishvilleNEW-YORK12024
WillsboroNEW-YORK12019
PhiladelphiaNEW-YORK12024
Grand IsleVERMONT12024

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