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

Wandering Tattler In BCR 2

All regionsBCR 2Shorebirds

Wandering Tattler in BCR 2 has fallen sharply: down 57% on the route-weighted index since 1995.

-57%Since 1995TrendPercent 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 →
7Routes 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 →
21YearsYears 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 →

Wandering Tattler has fallen sharply in BCR 2: down 57% on the route-weighted index since 1995.

Wandering Tattler In BCR 2 Population Forecast

If the recent trend holds, Wandering Tattler in BCR 2 is projected to stay roughly flat through 2028, near 0.24 (95% range 0.00–0.58). A 5-year backtest shows a typical error of ±66.9%, with 100% of held-out values landing inside the 95% band.

+6%Change by 2028TrendPercent 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 →
0.24Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.5895% 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 →
±66.9%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, Wandering Tattler in BCR 2 is projected to stay roughly flat through 2028, near 0.24 (95% range 0.00–0.58). A 5-year backtest shows a typical error of ±66.9%, with 100% of held-out values landing inside the 95% band.19862028
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 →
20240.250.000.59
20250.250.000.59
20260.240.000.59
20270.240.000.58
20280.240.000.58

Routes In BCR 2

Routes recording Wandering Tattler 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 →
TellerALASKA32012
CouncilALASKA22017
NomeALASKA22023
ChiniakALASKA11986
Salmon LakeALASKA12015
Kanektok RivALASKA12005
Goodnews BayALASKA12002

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