BirdAnalyst
Species · Nevada · BBS 2025 Release · 1966–2024

Greater Roadrunner Population Trend in Nevada

All statesArid-land birds

Greater Roadrunner in Nevada has held roughly steady: down 7% on the route-weighted index since 1994.

-7%Since 1994TrendPercent 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 →
6Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
24YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Greater Roadrunner Trends in NevadaNotable 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 Greater Roadrunner in Nevada. See the full index history below.

Greater Roadrunner Population Forecast in Nevada

If the recent trend holds, Greater Roadrunner in Nevada is projected to stay roughly flat through 2029, near 0.10 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±50.1%, with 80% of held-out values landing inside the 95% band.

-9%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 →
0.10Projected 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 →
0.00–0.2395% 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 →
±50.1%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, Greater Roadrunner in Nevada is projected to stay roughly flat through 2029, near 0.10 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±50.1%, with 80% 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 →
20250.100.000.23
20260.100.000.23
20270.100.000.23
20280.100.000.23
20290.100.000.23

Greater Roadrunner Survey Routes in Nevada

Routes recording Greater Roadrunner in Nevada.
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 →
Desert Nwr420211994
Ash Meadows320241994
Meadow Vally120172016
Hiko120181969
Beatty120162016
Val Of Fire120211993

Greater Roadrunner Population Trend in Other States

arizonaarkansascaliforniacoloradokansaslouisianamissourinew-mexicooklahomatexasutah

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