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Species · Massachusetts · BBS 2025 Release · 1966–2024

Louisiana Waterthrush Population Trend in Massachusetts

All statesForest birds

Louisiana Waterthrush in Massachusetts has surged: up 541% on the route-weighted index since 1969.

+541%Since 1969
16Routes In State
55Years

Notable Louisiana Waterthrush Trends in Massachusetts

long arc increasecomputed index

Louisiana Waterthrush has surged in Massachusetts: up 541% on the route-weighted index since 1969.

Louisiana Waterthrush Population Forecast in Massachusetts

If the recent trend holds, Louisiana Waterthrush in Massachusetts is projected to fall about 13% by 2029 — from 0.33 in 2024 to a central estimate of 0.29 (95% range 0.00–0.60). A 5-year backtest shows a typical error of ±49.9%, with 80% of held-out values landing inside the 95% band.

-13%Change by 2029
0.29Projected 2029 index
0.00–0.6095% range
±49.9%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
20250.280.000.59
20260.290.000.59
20270.290.000.60
20280.290.000.60
20290.290.000.60

Louisiana Waterthrush Survey Routes in Massachusetts

Routes recording Louisiana Waterthrush in Massachusetts.
Belchertown220241968
Warren220051969
S Barre220221981
Ware River120182018
Newburyport119861986
N Oxford119951995
N Orange120221971
Cummington120131970
Chesterfield120021967
Holden120211979
Pittsfield120001970
Sheffield120221970
Monterey120242019
Warren 2120242012
Cummington 2120242015
Hancock120151999

Louisiana Waterthrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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