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Species · Utah · BBS 2026 Release · 1966–2025

Pine Siskin Population Trend in Utah

All statesForest birds

Pine Siskin in Utah has increased: up 35% on the route-weighted index since 1971.

+35%Since 1971TrendPercent 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 →
54Routes 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 →
54YearsYears 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 UtahNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Pine Siskin in Utah. See the full index history below.

Pine Siskin Population Forecast in Utah

If the recent trend holds, Pine Siskin in Utah is projected to rise about 13% by 2030 — from 3.4 in 2025 to a central estimate of 3.8 (95% range 0.00–7.8). A 5-year backtest shows a typical error of ±94.2%, with 100% of held-out values landing inside the 95% band.

+13%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 →
3.8Projected 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 →
0.00–7.895% 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 →
±94.2%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, Pine Siskin in Utah is projected to rise about 13% by 2030 — from 3.4 in 2025 to a central estimate of 3.8 (95% range 0.00–7.8). A 5-year backtest shows a typical error of ±94.2%, 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 →
20263.80.007.8
20273.80.007.8
20283.80.007.8
20293.80.007.8
20303.80.007.8

Pine Siskin Survey Routes in Utah

Routes recording Pine Siskin in Utah.
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 →
La Sal4020001993
Grizzly Rdge3620251986
Skyline Driv3320251986
Navajo Lake3220251968
Uintah Nf2319941987
Wasatch Nf2320241988
Beaver2020251968
Soapstone2020251992
Heber Mtn.1920251996
La Sal 21520062003
Gooseberry1520251994
Ferron1420252000
Hite1119861986
Beck 21020251990
La Sal 31020252007
Red Spur Mtn.920231997
Gold Hill820242015
Beck719871970
Moon Lake720031994
Woodruff720252002
Moon Lake 2620232004
Dixie Nf620251993
Logan Canyon520191997
Leamington419961994
Gandy419971997

Pine Siskin Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseevermontvirginiawashingtonwest-virginiawisconsinwyoming

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