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Species · Wyoming · BBS 2026 Release · 1966–2025

Pine Siskin Population Trend in Wyoming

All statesForest birds

Pine Siskin in Wyoming has risen sharply: up 60% on the route-weighted index since 1970.

+60%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 →
61Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Pine Siskin 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 →

Pine Siskin has risen sharply in Wyoming: up 60% on the route-weighted index since 1970.

Pine Siskin Population Forecast in Wyoming

If the recent trend holds, Pine Siskin in Wyoming is projected to fall about 17% by 2030 — from 5.5 in 2025 to a central estimate of 4.5 (95% range 0.40–8.7). A 5-year backtest shows a typical error of ±31%, with 100% of held-out values landing inside the 95% band.

-17%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 →
4.5Projected 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 →
0.40–8.795% 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 →
±31%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, Pine Siskin in Wyoming is projected to fall about 17% by 2030 — from 5.5 in 2025 to a central estimate of 4.5 (95% range 0.40–8.7). A 5-year backtest shows a typical error of ±31%, 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 →
20264.50.358.6
20274.50.378.7
20284.50.388.7
20294.50.398.7
20304.50.408.7

Pine Siskin Survey Routes in Wyoming

Routes recording Pine Siskin 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 Park13620251993
Buckskin Mtn7520251981
Alpine5320251979
Colter Bay 24020252019
Mammoth3320251982
Wilson3220251979
Hunter Peak2220251982
Fox Park2220252013
Bald Mtn1920251990
Colter Bay1719991968
Moose1520251976
Ne Entrance1220251982
Hayden Val1219861985
Crazy Woman1220241979
Gebo1119801980
Warbonnet1120251990
Yellowstone1020241987
Fontenelle1019841984
Savery 21020252007
Sundance820241976
Soda Lake820251980
Fletcher Pk820251979
Savery719951989
Moskee720011980
Moran620162002

Pine Siskin Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsin

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