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Species · Connecticut · BBS 2025 Release · 1966–2024

Northern Waterthrush Population Trend in Connecticut

All statesForest birds

Northern Waterthrush in Connecticut has fallen sharply: down 54% on the route-weighted index since 1969.

-54%Since 1969
16Routes In State
50Years

Notable Northern Waterthrush Trends in Connecticut

long arc declinecomputed index

Northern Waterthrush has fallen sharply in Connecticut: down 54% on the route-weighted index since 1969.

Northern Waterthrush Population Forecast in Connecticut

If the recent trend holds, Northern Waterthrush in Connecticut is projected to fall about 19% by 2029 — from 0.22 in 2024 to a central estimate of 0.18 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±44.4%, with 100% of held-out values landing inside the 95% band.

-19%Change by 2029
0.18Projected 2029 index
0.00–0.4695% range
±44.4%Backtest error
19672029
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
20250.190.000.47
20260.180.000.46
20270.180.000.46
20280.180.000.46
20290.180.000.46

Northern Waterthrush Survey Routes in Connecticut

Routes recording Northern Waterthrush in Connecticut.
E Hartland219711968
New Hartford220111998
No Woodbury219981973
Woodstock 2220242018
New Hartford219791978
Mystic120021978
Uncasville120231999
Woodstock120051968
Willimantic120181967
Sherman119801980
Danbury120152009
Warren120081972
Long Hill120181982
Mid Haddam120231975
Southington119851976
Granby120232014

Northern Waterthrush Population Trend in Other States

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

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