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

Loggerhead Shrike In Edwards Plateau

All regionsEdwards PlateauGrassland birds

Loggerhead Shrike in Edwards Plateau has declined: down 49% on the route-weighted index since 1971.

-49%Since 1971TrendPercent 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 →
17Routes 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 →
55YearsYears 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 Loggerhead Shrike in Edwards Plateau. See the full index history below.

Loggerhead Shrike In Edwards Plateau Population Forecast

If the recent trend holds, Loggerhead Shrike in Edwards Plateau is projected to fall about 53% by 2030 — from 0.19 in 2025 to a central estimate of 0.09 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±15.9%, with 100% of held-out values landing inside the 95% band.

-53%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 →
0.09Projected 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 →
0.00–1.495% 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 →
±15.9%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, Loggerhead Shrike in Edwards Plateau is projected to fall about 53% by 2030 — from 0.19 in 2025 to a central estimate of 0.09 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±15.9%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.170.001.5
20270.150.001.5
20280.130.001.5
20290.110.001.4
20300.090.001.4

Routes In Edwards Plateau

Routes recording Loggerhead Shrike 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 →
San SabaTEXAS31998
PidcokeTEXAS32010
ManorTEXAS32024
LeanderTEXAS22006
BoerneTEXAS11998
UtopiaTEXAS11986
GeorgetownTEXAS11984
FitzhughTEXAS11976
Valley SpgsTEXAS12018
HarperTEXAS12022
KempnerTEXAS12015
AdamsvilleTEXAS12025
Dripping SpgTEXAS12012
Pidcoke 2TEXAS12025
Manor 2TEXAS12025
LeakeyTEXAS12000
Prairie Mtn.TEXAS12008

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