BirdAnalyst
Species · BCR 35 · BBS 2026 Release · 1966–2025

Greater Roadrunner In Chihuahuan Desert

All regionsChihuahuan DesertArid-land birds

Greater Roadrunner in Chihuahuan Desert has edged down: down 13% on the route-weighted index since 1969.

-13%Since 1969TrendPercent 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 →
56Routes 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 →
58YearsYears 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 Chihuahuan Desert. See the full index history below.

Greater Roadrunner In Chihuahuan Desert Population Forecast

If the recent trend holds, Greater Roadrunner in Chihuahuan Desert is projected to rise about 16% by 2030 — from 1.5 in 2025 to a central estimate of 1.7 (95% range 0.31–3.2). A 5-year backtest shows a typical error of ±65.8%, with 100% of held-out values landing inside the 95% band.

+16%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 →
1.7Projected 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 →
0.31–3.295% 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 →
±65.8%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 Chihuahuan Desert is projected to rise about 16% by 2030 — from 1.5 in 2025 to a central estimate of 1.7 (95% range 0.31–3.2). A 5-year backtest shows a typical error of ±65.8%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20261.70.283.1
20271.70.293.1
20281.70.293.1
20291.70.303.2
20301.70.313.2

Routes In Chihuahuan Desert

Routes recording Greater Roadrunner in Chihuahuan Desert.
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 →
Devils R CynTEXAS132025
ComstockTEXAS112017
ToyahvaleTEXAS82025
Dove Mtn.TEXAS72004
Delaware CrkTEXAS52015
LaborcitaNEW-MEXICO42019
Bear MtnTEXAS42025
Ft. StocktonTEXAS42023
PumpvilleTEXAS42025
Capitan Mtn.NEW-MEXICO32017
Bitter LakeNEW-MEXICO32025
GirvinTEXAS32025
OzonaTEXAS32019
Coyanda DrawTEXAS32024
Chisos BasinTEXAS32025
San AntonioNEW-MEXICO21977
DemingNEW-MEXICO21974
Red RockNEW-MEXICO22025
PinonNEW-MEXICO22017
Hatchet PeakNEW-MEXICO22024
ColumbusNEW-MEXICO22024
Laborcita 2NEW-MEXICO22025
Black GapTEXAS22025
LongfellowTEXAS22023
AltudaTEXAS22018

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