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

Whimbrel In BCR 2

All regionsBCR 2Shorebirds

Whimbrel in BCR 2 has declined: down 29% on the route-weighted index since 1993.

-29%Since 1993TrendPercent 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 →
11Routes 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 →
34YearsYears 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 Whimbrel in BCR 2. See the full index history below.

Whimbrel In BCR 2 Population Forecast

If the recent trend holds, Whimbrel in BCR 2 is projected to fall about 49% by 2030 — from 1.3 in 2025 to a central estimate of 0.68 (95% range 0.00–3.6). A 5-year backtest shows a typical error of ±85%, with 80% of held-out values landing inside the 95% band.

-49%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 →
0.68Projected 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 →
0.00–3.695% 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 →
±85%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, Whimbrel in BCR 2 is projected to fall about 49% by 2030 — from 1.3 in 2025 to a central estimate of 0.68 (95% range 0.00–3.6). A 5-year backtest shows a typical error of ±85%, with 80% of held-out values landing inside the 95% band.19862030
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 →
20260.860.003.7
20270.810.003.7
20280.770.003.7
20290.720.003.6
20300.680.003.6

Routes In BCR 2

Routes recording Whimbrel 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 →
Kugarak (Short)ALASKA161987
Kotzebue (Short)ALASKA161994
KotzebueALASKA72025
Selawik (Short)ALASKA71987
Cape NomeALASKA32024
NomeALASKA32023
St. Mary'SALASKA32014
TellerALASKA22010
Gweek RiverALASKA22002
King SalmonALASKA12025
CouncilALASKA12012

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