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Species · Wyoming · BBS 2026 Release · 1966–2025

Clark's Nutcracker Population Trend in Wyoming

All statesForest birds

Clark's Nutcracker in Wyoming has surged: up 199% on the route-weighted index since 1970.

+199%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 →
51Routes 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 Clark's Nutcracker 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 →

Clark's Nutcracker has surged in Wyoming: up 199% on the route-weighted index since 1970.

Clark's Nutcracker Population Forecast in Wyoming

If the recent trend holds, Clark's Nutcracker in Wyoming is projected to stay roughly flat through 2030, near 1.4 (95% range 0.23–2.6). A 5-year backtest shows a typical error of ±47.6%, with 100% of held-out values landing inside the 95% band.

+6%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 →
1.4Projected 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 →
0.23–2.695% 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 →
±47.6%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, Clark's Nutcracker in Wyoming is projected to stay roughly flat through 2030, near 1.4 (95% range 0.23–2.6). A 5-year backtest shows a typical error of ±47.6%, 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 →
20261.40.202.6
20271.40.212.6
20281.40.212.6
20291.40.222.6
20301.40.232.6

Clark's Nutcracker Survey Routes in Wyoming

Routes recording Clark's Nutcracker 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 →
Alpine1920241990
Prior Flats1620251991
Wilson1520251979
Walcott1420012001
Yellowstone1120251987
Buford1120251978
Buckskin Mtn1020251980
West Thumb919821982
Bald Mtn920241991
Fiddler Lk920251979
Gas Hills719931991
Mammoth620251982
Horse Creek620251980
Anchor620181993
Big Sandy620251988
Dubois520251968
Nowood520251994
Fox Park520251998
Colter Bay 2420252022
Moran420162002
Sybille Cyn420251980
Rock River420061998
Colter Bay319991989
Bairoil320251990
Warbonnet320251994

Clark's Nutcracker Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicooregonsouth-dakotautahwashington

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