BirdAnalyst
Species · Oregon · BBS 2025 Release · 1966–2024

Pine Siskin Population Trend in Oregon

All statesGeneralists

Pine Siskin in Oregon has fallen sharply: down 66% on the route-weighted index since 1970.

-66%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 →
96Routes 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 Pine Siskin Trends in OregonNotable 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 →

Pine Siskin has fallen sharply in Oregon: down 66% on the route-weighted index since 1970.

Pine Siskin Population Forecast in Oregon

If the recent trend holds, Pine Siskin in Oregon is projected to fall about 76% by 2029 — from 1.7 in 2024 to a central estimate of 0.41 (95% range 0.00–5.8). A 5-year backtest shows a typical error of ±324.1%, with 100% of held-out values landing inside the 95% band.

-76%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 →
0.41Projected 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 →
0.00–5.895% 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 →
±324.1%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, Pine Siskin in Oregon is projected to fall about 76% by 2029 — from 1.7 in 2024 to a central estimate of 0.41 (95% range 0.00–5.8). A 5-year backtest shows a typical error of ±324.1%, 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 →
20250.730.006.2
20260.650.006.1
20270.570.006.0
20280.490.005.9
20290.410.005.8

Pine Siskin Survey Routes in Oregon

Routes recording Pine Siskin in Oregon.
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 →
Ochoco2919821972
Hells Canyon2120221992
Eagle Creek1920221993
Bly1819941974
Mt Hood1720241972
Dell Spring1519961968
Granite1520241986
Donnelly1419951994
Howard Mdws.1320241992
Sisters1120241997
Wickiup1020241969
Clearwater920211991
Days Creek820131970
Albee720221968
Warner Mtn.720241992
Emigrant Lk619991983
Blizzard Gap619841984
Hash Rock620241983
Trask Summit620241992
Troy620241992
Newbridge620241992
Tualatin520241968
Cool Camp519921970
Paisley520221973
Sparta519961994

Pine Siskin Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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