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

Eastern Yellow Wagtail In BCR 2

All regionsBCR 2Grassland birds

Eastern Yellow Wagtail in BCR 2 has collapsed: down 82% on the route-weighted index since 1994.

-82%Since 1994TrendPercent 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 →
12Routes 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 →
33YearsYears 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 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 →

Eastern Yellow Wagtail has collapsed in BCR 2: down 82% on the route-weighted index since 1994.

Eastern Yellow Wagtail In BCR 2 Population Forecast

If the recent trend holds, Eastern Yellow Wagtail in BCR 2 is projected to fall about 100% by 2030 — from 1.2 in 2025 to a central estimate of 0.00 (95% range 0.00–4.4). A 5-year backtest shows a typical error of ±72.5%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–4.495% 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 →
±72.5%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, Eastern Yellow Wagtail in BCR 2 is projected to fall about 100% by 2030 — from 1.2 in 2025 to a central estimate of 0.00 (95% range 0.00–4.4). A 5-year backtest shows a typical error of ±72.5%, with 100% 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 →
20260.440.004.8
20270.270.004.7
20280.100.004.5
20290.000.004.4
20300.000.004.4

Routes In BCR 2

Routes recording Eastern Yellow Wagtail 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 →
Goodnews BayALASKA272005
Kanektok RivALASKA242005
Togiak RiverALASKA122005
Kotzebue (Short)ALASKA91994
KotzebueALASKA72025
Salmon LakeALASKA62012
Cape NomeALASKA52012
TellerALASKA22018
Selawik (Short)ALASKA21986
CouncilALASKA12023
NomeALASKA12010
St. Mary'SALASKA12002

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