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Species · Wyoming · BBS 2025 Release · 1966–2024

White-breasted Nuthatch Population Trend in Wyoming

All statesForest birds

White-breasted Nuthatch in Wyoming has collapsed: down 87% on the route-weighted index since 1976.

-87%Since 1976TrendPercent 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 →
34Routes 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 White-breasted Nuthatch 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 declinecomputed 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 →

White-breasted Nuthatch has collapsed in Wyoming: down 87% on the route-weighted index since 1976.

White-breasted Nuthatch Population Forecast in Wyoming

If the recent trend holds, White-breasted Nuthatch in Wyoming is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.30). A 5-year backtest shows a typical error of ±90.2%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.04Projected 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 →
0.00–0.3095% 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 →
±90.2%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, White-breasted Nuthatch in Wyoming is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.30). A 5-year backtest shows a typical error of ±90.2%, with 100% of held-out values landing inside the 95% band.19732029
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 →
20250.060.000.32
20260.050.000.31
20270.050.000.31
20280.040.000.30
20290.040.000.30

White-breasted Nuthatch Survey Routes in Wyoming

Routes recording White-breasted Nuthatch 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 →
Ryan Park519931993
Hunter Peak420171982
Soda Lake419921992
Fiddler Lk420071979
Moskee320011980
Savery219951992
Riverside220042004
Mammoth220131991
Recluse220221983
Alpine219931979
Moskee 2220192002
Yellowstone120062000
Sundance120241975
Dubois120231973
Brookhurst120161973
Gvnt Valley120072007
Buford120231979
Moose120232019
Meeteetse120132013
Bald Mtn119941992
Crazy Woman120051979
Wilson119971984
Horse Creek120071984
Colter Bay 2120192019
Anchor120052002

White-breasted Nuthatch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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