BirdAnalyst
Species · BCR 34 · BBS 2026 Release · 1966–2025

Greater Roadrunner In Sierra Madre Occidental

All regionsSierra Madre OccidentalArid-land birds

Greater Roadrunner in Sierra Madre Occidental has declined: down 33% on the route-weighted index since 1970.

-33%Since 1970TrendPercent 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 →
26Routes 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 →
57YearsYears 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 Greater Roadrunner in Sierra Madre Occidental. See the full index history below.

Greater Roadrunner In Sierra Madre Occidental Population Forecast

If the recent trend holds, Greater Roadrunner in Sierra Madre Occidental is projected to fall about 40% by 2030 — from 2.0 in 2025 to a central estimate of 1.2 (95% range 0.00–3.3). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.

-40%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 →
1.2Projected 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 →
0.00–3.395% 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 →
±44.3%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, Greater Roadrunner in Sierra Madre Occidental is projected to fall about 40% by 2030 — from 2.0 in 2025 to a central estimate of 1.2 (95% range 0.00–3.3). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20261.30.003.4
20271.20.003.4
20281.20.003.4
20291.20.003.4
20301.20.003.3

Routes In Sierra Madre Occidental

Routes recording Greater Roadrunner in Sierra Madre Occidental.
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 →
Skull ValleyARIZONA142024
Skull Valley 2ARIZONA82025
RuckerARIZONA82009
PomereneARIZONA72025
Bartlett ResARIZONA52025
Carr MtnARIZONA52025
SprucedaleARIZONA52025
PatagoniaARIZONA42025
SahuaritaARIZONA42025
PortalARIZONA42025
Vicks PeakNEW-MEXICO42025
RedingtonARIZONA32023
Sunizona 2ARIZONA32023
Emory PassNEW-MEXICO32025
SunizonaARIZONA21997
McnealARIZONA22025
PrescottARIZONA12015
San SimonARIZONA12023
Peña BlancaARIZONA12024
Forest LakesARIZONA12021
CutterARIZONA12014
AmadoARIZONA12023
Clay SpringARIZONA12014
DragoonARIZONA12009
ReserveNEW-MEXICO12025

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