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Species · BCR 20 · BBS 2026 Release · 1966–2025

Blue Grosbeak In Edwards Plateau

All regionsEdwards PlateauForest birds

Blue Grosbeak in Edwards Plateau has surged: up 753% on the route-weighted index since 1969.

+753%Since 1969TrendPercent 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 →
20Routes 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 →
58YearsYears 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 increasecomputed 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 →

Blue Grosbeak has surged in Edwards Plateau: up 753% on the route-weighted index since 1969.

Blue Grosbeak In Edwards Plateau Population Forecast

If the recent trend holds, Blue Grosbeak in Edwards Plateau is projected to stay roughly flat through 2030, near 4.4 (95% range 2.4–6.4). A 5-year backtest shows a typical error of ±19%, with 100% of held-out values landing inside the 95% band.

-9%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 →
4.4Projected 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 →
2.4–6.495% 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 →
±19%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, Blue Grosbeak in Edwards Plateau is projected to stay roughly flat through 2030, near 4.4 (95% range 2.4–6.4). A 5-year backtest shows a typical error of ±19%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20264.22.26.2
20274.32.36.3
20284.32.36.3
20294.42.46.4
20304.42.46.4

Routes In Edwards Plateau

Routes recording Blue Grosbeak in Edwards Plateau.
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 →
Allen CreekTEXAS122025
AdamsvilleTEXAS112025
UtopiaTEXAS102025
LeakeyTEXAS82025
Indian MtnTEXAS62025
Prairie Mtn.TEXAS52025
RockspringTEXAS52025
Dripping SpgTEXAS42025
Pidcoke 2TEXAS42025
MontellTEXAS42025
BoerneTEXAS32025
Valley SpgsTEXAS32025
San SabaTEXAS32024
PidcokeTEXAS22008
KempnerTEXAS22025
GeorgetownTEXAS11972
FitzhughTEXAS11971
HarperTEXAS12025
ManorTEXAS12024
LeanderTEXAS12004

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