BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

Western Meadowlark Population Trend in Wyoming

All statesGrassland birds

Western Meadowlark in Wyoming has declined: down 25% on the route-weighted index since 1970.

-25%Since 1970TrendPercent 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 →
132Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Western Meadowlark Trends in WyomingNotable 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 Western Meadowlark in Wyoming. See the full index history below.

Western Meadowlark Population Forecast in Wyoming

If the recent trend holds, Western Meadowlark in Wyoming is projected to stay roughly flat through 2030, near 62 (95% range 16–109). A 5-year backtest shows a typical error of ±13.1%, with 100% of held-out values landing inside the 95% band.

-9%Change by 2030TrendPercent 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 →
62Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
16–10995% 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 →
±13.1%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, Western Meadowlark in Wyoming is projected to stay roughly flat through 2030, near 62 (95% range 16–109). A 5-year backtest shows a typical error of ±13.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20266518111
20276417111
20286417110
20296316110
20306216109

Western Meadowlark Survey Routes in Wyoming

Routes recording Western Meadowlark in Wyoming.
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 →
Wyarno64020251974
Bucknum31520241993
Gvnt Valley27720251992
Kaycee22320252014
Harland Flat22220251990
Newcastle21520251988
Redbird21219891968
Upton20720251987
Lusk20020251982
Savageton19120252019
Rozet19020251991
Raven18920251992
Worland18120251992
Chugwater17120241979
Arvada17020251982
Clarkelen16819781968
Seely16620001990
Meadowdale16520251983
Schoonover15520251982
Welch14920191978
Bill14320181974
Thunder Basin14120252011
Pine Tree13819951980
Soda Well13720251979
Seely 213420252001

Western Meadowlark Population Trend in Other States

arizonacaliforniacoloradoidahoillinoisindianaiowakansaskentuckymichiganminnesotamissourimontananebraskanevadanew-mexiconew-yorknorth-dakotaohiooklahomaoregonpennsylvaniasouth-dakotatexasutahwashingtonwisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.