BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Pine Siskin In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Pine Siskin in Southern Rockies / Colorado Plateau has surged: up 106% on the route-weighted index since 1970.

+106%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 →
160Routes In RegionSurvey 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 SignalsNotable 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 surged in Southern Rockies / Colorado Plateau: up 106% on the route-weighted index since 1970.

Pine Siskin In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Pine Siskin in Southern Rockies / Colorado Plateau is projected to rise about 11% by 2030 — from 7.2 in 2025 to a central estimate of 7.9 (95% range 2.8–13). A 5-year backtest shows a typical error of ±89.9%, with 80% of held-out values landing inside the 95% band.

+11%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 →
7.9Projected 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 →
2.8–1395% 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 →
±89.9%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 Southern Rockies / Colorado Plateau is projected to rise about 11% by 2030 — from 7.2 in 2025 to a central estimate of 7.9 (95% range 2.8–13). A 5-year backtest shows a typical error of ±89.9%, with 80% 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 →
20267.82.613
20277.82.713
20287.92.713
20297.92.713
20307.92.813

Routes In Southern Rockies / Colorado Plateau

Routes recording Pine Siskin in Southern Rockies / Colorado Plateau.
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 ParkWYOMING1362025
TincupCOLORADO672025
Stillwater PassCOLORADO612009
La SalUTAH402000
Dolores RivCOLORADO392025
Grizzly RdgeUTAH362025
Willow PeakCOLORADO332025
Skyline DrivUTAH332025
Navajo LakeUTAH322025
Lake City 2COLORADO312025
Owl Creek PassCOLORADO302025
Pinos CreekCOLORADO271990
Stillwater Pass 2COLORADO272025
Heeney 2COLORADO262025
CastletonCOLORADO252025
Guanella PasCOLORADO242025
Groundhog RsCOLORADO232025
Uintah NfUTAH231994
Wasatch NfUTAH232024
Dunckley PasCOLORADO222025
Steamboat L.COLORADO222025
Fox ParkWYOMING222025
Red CliffCOLORADO212025
ThomasvilleCOLORADO202025
Weston PassCOLORADO202000

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