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Species · Wyoming · BBS 2025 Release · 1966–2024

Sharp-tailed Grouse Population Trend in Wyoming

All statesGeneralists

Sharp-tailed Grouse in Wyoming has risen sharply: up 56% on the route-weighted index since 1984.

+56%Since 1984TrendPercent 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 →
25YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Sharp-tailed Grouse 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Sharp-tailed Grouse has risen sharply in Wyoming: up 56% on the route-weighted index since 1984.

Sharp-tailed Grouse Population Forecast in Wyoming

If the recent trend holds, Sharp-tailed Grouse in Wyoming is projected to rise about 24% by 2029 — from 0.10 in 2024 to a central estimate of 0.13 (95% range 0.00–0.33). A 5-year backtest shows a typical error of ±130.5%, with 100% of held-out values landing inside the 95% band.

+24%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 →
0.13Projected 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 →
0.00–0.3395% 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 →
±130.5%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, Sharp-tailed Grouse in Wyoming is projected to rise about 24% by 2029 — from 0.10 in 2024 to a central estimate of 0.13 (95% range 0.00–0.33). A 5-year backtest shows a typical error of ±130.5%, with 100% of held-out values landing inside the 95% band.19792029
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 →
20250.120.000.32
20260.120.000.33
20270.120.000.33
20280.120.000.33
20290.130.000.33

Sharp-tailed Grouse Survey Routes in Wyoming

Routes recording Sharp-tailed Grouse 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 →
Seely 2520162013
Raven420242024
Recluse320041999
Chugwater320242012
Sundance220232001
Dayton220161984
Arvada220012001
Pine Bluff219981998
Clark120022002
Wyarno120211979
Newcastle120242000
Schoonover120001990
Soda Well120192015
Cheyenne119941994
Upton120242024
Gvnt Valley120231992
Moskee 2120042004

Sharp-tailed Grouse Population Trend in Other States

alaskacoloradoidahomichiganminnesotamontananebraskanorth-dakotasouth-dakotautahwashingtonwisconsin

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