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

Bronzed Cowbird In Edwards Plateau

All regionsEdwards PlateauGeneralists

Bronzed Cowbird in Edwards Plateau has held roughly steady: up 7% on the route-weighted index since 1978.

+7%Since 1978TrendPercent 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 →
9Routes 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 →
42YearsYears 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 Bronzed Cowbird in Edwards Plateau. See the full index history below.

Bronzed Cowbird In Edwards Plateau Population Forecast

If the recent trend holds, Bronzed Cowbird in Edwards Plateau is projected to rise about 296% by 2029 — from 0.13 in 2024 to a central estimate of 0.49 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±297.1%, with 100% of held-out values landing inside the 95% band.

+296%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 →
0.49Projected 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 →
0.00–1.395% 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 →
±297.1%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, Bronzed Cowbird in Edwards Plateau is projected to rise about 296% by 2029 — from 0.13 in 2024 to a central estimate of 0.49 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±297.1%, with 100% of held-out values landing inside the 95% band.19742029
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 →
20250.490.001.2
20260.490.001.2
20270.490.001.2
20280.490.001.2
20290.490.001.3

Routes In Edwards Plateau

Routes recording Bronzed Cowbird 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 SabaTEXAS21994
Indian MtnTEXAS22003
MontellTEXAS22024
RockspringTEXAS21998
BoerneTEXAS11992
UtopiaTEXAS12023
HarperTEXAS11985
LeakeyTEXAS12005
Prairie Mtn.TEXAS12023

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