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

Verdin In Edwards Plateau

All regionsEdwards PlateauArid-land birds

Verdin in Edwards Plateau has declined: down 37% on the route-weighted index since 1971.

-37%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 →
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 →
54YearsYears 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 Verdin in Edwards Plateau. See the full index history below.

Verdin In Edwards Plateau Population Forecast

If the recent trend holds, Verdin in Edwards Plateau is projected to rise about 107% by 2030 — from 0.63 in 2025 to a central estimate of 1.3 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±361.3%, with 100% of held-out values landing inside the 95% band.

+107%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 →
1.3Projected 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 →
0.00–3.095% 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 →
±361.3%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, Verdin in Edwards Plateau is projected to rise about 107% by 2030 — from 0.63 in 2025 to a central estimate of 1.3 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±361.3%, 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 →
20261.30.003.0
20271.30.003.0
20281.30.003.0
20291.30.003.0
20301.30.003.0

Routes In Edwards Plateau

Routes recording Verdin 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 →
MontellTEXAS52025
BoerneTEXAS41986
Valley SpgsTEXAS42019
HarperTEXAS42019
UtopiaTEXAS21992
Indian MtnTEXAS22025
LeakeyTEXAS22025
FitzhughTEXAS11976
San SabaTEXAS12019
LeanderTEXAS12001
Prairie Mtn.TEXAS12018
RockspringTEXAS12025

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