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Species · BCR 2 · BBS 2026 Release · 1966–2025

Pine Grosbeak In BCR 2

All regionsBCR 2Forest birds

Pine Grosbeak in BCR 2 has increased: up 25% on the route-weighted index since 1985.

+25%Since 1985TrendPercent 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 →
8Routes 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 →
41YearsYears 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 →

No notable trend signals for Pine Grosbeak in BCR 2. See the full index history below.

Pine Grosbeak In BCR 2 Population Forecast

If the recent trend holds, Pine Grosbeak in BCR 2 is projected to rise about 23% by 2030 — from 2.0 in 2025 to a central estimate of 2.5 (95% range 0.34–4.6). A 5-year backtest shows a typical error of ±39.8%, with 100% of held-out values landing inside the 95% band.

+23%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 →
2.5Projected 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 →
0.34–4.695% 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 →
±39.8%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 Grosbeak in BCR 2 is projected to rise about 23% by 2030 — from 2.0 in 2025 to a central estimate of 2.5 (95% range 0.34–4.6). A 5-year backtest shows a typical error of ±39.8%, with 100% of held-out values landing inside the 95% band.19832030
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 →
20262.30.184.4
20272.30.224.5
20282.40.264.5
20292.40.304.5
20302.50.344.6

Routes In BCR 2

Routes recording Pine Grosbeak in BCR 2.
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 →
Kodiak 2ALASKA52025
Gweek RiverALASKA42002
Katmai N.P.ALASKA32025
ChiniakALASKA32025
KodiakALASKA21984
Cold BayALASKA22021
DillinghamALASKA12019
King SalmonALASKA12025

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