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

Great Blue Heron In Edwards Plateau

All regionsEdwards PlateauWetland birds

Great Blue Heron in Edwards Plateau has declined: down 43% on the route-weighted index since 1970.

-43%Since 1970TrendPercent 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 →
19Routes 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 →
57YearsYears 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 Great Blue Heron in Edwards Plateau. See the full index history below.

Great Blue Heron In Edwards Plateau Population Forecast

If the recent trend holds, Great Blue Heron in Edwards Plateau is projected to fall about 22% by 2030 — from 0.44 in 2025 to a central estimate of 0.34 (95% range 0.00–0.82). A 5-year backtest shows a typical error of ±29.5%, with 100% of held-out values landing inside the 95% band.

-22%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 →
0.34Projected 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 →
0.00–0.8295% 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 →
±29.5%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, Great Blue Heron in Edwards Plateau is projected to fall about 22% by 2030 — from 0.44 in 2025 to a central estimate of 0.34 (95% range 0.00–0.82). A 5-year backtest shows a typical error of ±29.5%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.370.000.85
20270.360.000.85
20280.360.000.84
20290.350.000.83
20300.340.000.82

Routes In Edwards Plateau

Routes recording Great Blue Heron 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 →
ManorTEXAS42024
HarperTEXAS32024
AdamsvilleTEXAS22024
BoerneTEXAS12018
UtopiaTEXAS12022
GeorgetownTEXAS11980
FitzhughTEXAS11982
Valley SpgsTEXAS12025
San SabaTEXAS12025
PidcokeTEXAS12014
KempnerTEXAS12023
Indian MtnTEXAS12025
Dripping SpgTEXAS12025
Pidcoke 2TEXAS12025
LeanderTEXAS12006
Manor 2TEXAS12025
LeakeyTEXAS12025
MontellTEXAS12021
Prairie Mtn.TEXAS12023

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