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

Marsh Wren Population Trend in Idaho

All statesForest birds

Marsh Wren in Idaho has fallen sharply: down 53% on the route-weighted index since 1980.

-53%Since 1980
15Routes In State
38Years

Notable Marsh Wren Trends in Idaho

long arc declinecomputed index

Marsh Wren has fallen sharply in Idaho: down 53% on the route-weighted index since 1980.

Marsh Wren Population Forecast in Idaho

If the recent trend holds, Marsh Wren in Idaho is projected to fall about 12% by 2029 — from 0.08 in 2024 to a central estimate of 0.07 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±43.1%, with 100% of held-out values landing inside the 95% band.

-12%Change by 2029
0.07Projected 2029 index
0.00–0.2395% range
±43.1%Backtest error
19732029
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
20250.080.000.24
20260.080.000.24
20270.070.000.24
20280.070.000.24
20290.070.000.23

Marsh Wren Survey Routes in Idaho

Routes recording Marsh Wren in Idaho.
Springfield320181980
Naples220241973
Cabarton220051999
Blacks Creek220121989
Picabo220141988
Bates220192019
Blackft Res120132009
Preston120231988
Baker120162009
Pasadena Val120141995
Crane Creek120032003
Iron Springs119891989
Acequia120022002
Henry119831983
Coolin120182018

Marsh Wren Population Trend in Other States

alabamaarizonacaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaslouisianamainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwisconsinwyoming

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