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

Marsh Wren Population Trend in Nebraska

All statesForest birds

Marsh Wren in Nebraska has edged up: up 14% on the route-weighted index since 1969.

+14%Since 1969TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
17Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
48YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Marsh Wren Trends in NebraskaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Marsh Wren in Nebraska. See the full index history below.

Marsh Wren Population Forecast in Nebraska

If the recent trend holds, Marsh Wren in Nebraska is projected to rise about 492% by 2029 — from 0.17 in 2024 to a central estimate of 0.99 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±933.4%, with 100% of held-out values landing inside the 95% band.

+492%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.99Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–2.595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±933.4%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Marsh Wren in Nebraska is projected to rise about 492% by 2029 — from 0.17 in 2024 to a central estimate of 0.99 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±933.4%, with 100% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.960.002.5
20260.970.002.5
20270.970.002.5
20280.980.002.5
20290.990.002.5

Marsh Wren Survey Routes in Nebraska

Routes recording Marsh Wren in Nebraska.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Crescent Lk2920171980
Nenzel620242019
Chambers420232023
Mullen320232017
Piester Lake319921968
Agate 2220112011
Brownlee220242010
Richland220162016
Gordon120112011
Murray Lake120182003
Surprise120212021
Wheeler Co120232010
Dalton119741974
Sparta120191967
Swan Lake120001997
Johnstown119991995
Kennedy120221995

Marsh Wren Population Trend in Other States

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

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