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Species · Wyoming · BBS 2025 Release · 1966–2024

Clark's Nutcracker Population Trend in Wyoming

All statesGeneralists

Clark's Nutcracker in Wyoming has surged: up 187% on the route-weighted index since 1970.

+187%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 →
56YearsYears 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 187% 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 rise about 15% by 2029 — from 1.2 in 2024 to a central estimate of 1.4 (95% range 0.20–2.7). A 5-year backtest shows a typical error of ±87.1%, with 100% of held-out values landing inside the 95% band.

+15%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 →
1.4Projected 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 →
0.20–2.795% 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 →
±87.1%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, Clark's Nutcracker in Wyoming is projected to rise about 15% by 2029 — from 1.2 in 2024 to a central estimate of 1.4 (95% range 0.20–2.7). A 5-year backtest shows a typical error of ±87.1%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20251.40.172.6
20261.40.182.6
20271.40.182.6
20281.40.192.6
20291.40.202.7

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
Moose1820241976
Dubois1420241968
Walcott1420012001
Prior Flats1120241991
Yellowstone920221987
West Thumb919821982
Bald Mtn920241991
Horse Creek920241980
Fletcher Pk820241979
Gas Hills719931991
Anchor620181993
Buford520191978
Hunter Peak520101982
Buckskin Mtn520211980
Colter Bay 2420242022
Fiddler Lk420241979
Moran420162002
Rock River420061998
Colter Bay319991989
Warbonnet320241994
Ne Entrance220181988
Hayden Val219861985
Savery219921992
Mammoth220241982

Clark's Nutcracker Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicooregonsouth-dakotautahwashington

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