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Species · BCR 2 · BBS 2025 Release · 1966–2024

Pine Grosbeak In BCR 2

All regionsBCR 2Generalists

Pine Grosbeak in BCR 2 has edged up: up 18% on the route-weighted index since 1985.

+18%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 →
40YearsYears 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.

Forecast

If the recent trend holds, Pine Grosbeak in BCR 2 is projected to rise about 58% by 2029 — from 1.6 in 2024 to a central estimate of 2.5 (95% range 0.30–4.6). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.

+58%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 →
2.5Projected 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 →
0.30–4.695% 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 →
±44.3%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 58% by 2029 — from 1.6 in 2024 to a central estimate of 2.5 (95% range 0.30–4.6). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.19832029
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 →
20252.30.154.4
20262.30.194.5
20272.40.234.5
20282.40.274.6
20292.50.304.6

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 2ALASKA102024
Gweek RiverALASKA42002
ChiniakALASKA32024
KodiakALASKA21984
Cold BayALASKA22021
Katmai N.P.ALASKA12005
DillinghamALASKA12019
King SalmonALASKA12024

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