BirdAnalyst
Species · BCR 20 · BBS 2025 Release · 1966–2024

Verdin In Edwards Plateau

All regionsEdwards PlateauArid-land birds

Verdin in Edwards Plateau has fallen sharply: down 53% on the route-weighted index since 1971.

-53%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 →
53YearsYears 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 →

Verdin has fallen sharply in Edwards Plateau: down 53% on the route-weighted index since 1971.

Verdin In Edwards Plateau Population Forecast

If the recent trend holds, Verdin in Edwards Plateau is projected to rise about 208% by 2029 — from 0.44 in 2024 to a central estimate of 1.3 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±321.2%, with 100% of held-out values landing inside the 95% band.

+208%Change by 2029TrendPercent 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 2029 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 →
±321.2%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 208% by 2029 — from 0.44 in 2024 to a central estimate of 1.3 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±321.2%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20251.30.003.0
20261.30.003.0
20271.30.003.0
20281.30.003.0
20291.30.003.0

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 →
BoerneTEXAS41986
Valley SpgsTEXAS42019
HarperTEXAS42019
RockspringTEXAS32024
UtopiaTEXAS21992
Indian MtnTEXAS22024
LeakeyTEXAS22023
MontellTEXAS22024
FitzhughTEXAS11976
San SabaTEXAS12019
LeanderTEXAS12001
Prairie Mtn.TEXAS12018

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