BirdAnalyst
Species · Idaho · BBS 2025 Release · 1966–2024

Northern Waterthrush Population Trend in Idaho

All statesForest birds

Northern Waterthrush in Idaho has declined: down 28% on the route-weighted index since 1983.

-28%Since 1983
13Routes In State
30Years

Notable Northern Waterthrush Trends in Idaho

No notable trend signals for Northern Waterthrush in Idaho. See the full index history below.

Northern Waterthrush Population Forecast in Idaho

If the recent trend holds, Northern Waterthrush in Idaho is projected to stay roughly flat through 2029, near 0.13 (95% range 0.00–0.28). A 5-year backtest shows a typical error of ±128.8%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029
0.13Projected 2029 index
0.00–0.2895% range
±128.8%Backtest error
19812029
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
20250.130.000.27
20260.130.000.27
20270.130.000.27
20280.130.000.28
20290.130.000.28

Northern Waterthrush Survey Routes in Idaho

Routes recording Northern Waterthrush in Idaho.
Lolo Pass320192000
Golden320102007
Mivoden220151982
Pierce220072003
Naples120242002
Avery120191981
Nezperce120122006
Marble Creek120191990
N Fork Cda R120162009
Rochat Divde120192003
Yellow Pine119981998
Sunbeam120182018
Coolin120221987

Northern Waterthrush Population Trend in Other States

alaskaconnecticutmainemarylandmassachusettsmichiganminnesotamontananew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandvermontvirginiawashingtonwest-virginiawisconsinwyoming

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