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

Arizona Woodpecker In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Arizona Woodpecker in Sierra Madre Occidental has risen sharply: up 57% on the route-weighted index since 1975.

+57%Since 1975TrendPercent 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 RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
51YearsYears 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 increasecomputed 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 →

Arizona Woodpecker has risen sharply in Sierra Madre Occidental: up 57% on the route-weighted index since 1975.

Arizona Woodpecker In Sierra Madre Occidental Population Forecast

If the recent trend holds, Arizona Woodpecker in Sierra Madre Occidental is projected to fall about 58% by 2030 — from 0.30 in 2025 to a central estimate of 0.13 (95% range 0.00–0.66). A 5-year backtest shows a typical error of ±66.1%, with 100% of held-out values landing inside the 95% band.

-58%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 →
0.13Projected 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 →
0.00–0.6695% 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 →
±66.1%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, Arizona Woodpecker in Sierra Madre Occidental is projected to fall about 58% by 2030 — from 0.30 in 2025 to a central estimate of 0.13 (95% range 0.00–0.66). A 5-year backtest shows a typical error of ±66.1%, with 100% of held-out values landing inside the 95% band.19732030
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 →
20260.150.000.69
20270.140.000.68
20280.140.000.68
20290.130.000.67
20300.130.000.66

Routes In Sierra Madre Occidental

Routes recording Arizona Woodpecker 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 →
PatagoniaARIZONA52025
PortalARIZONA22025
RuckerARIZONA22003
Peña BlancaARIZONA12025
SunizonaARIZONA11986
Sunizona 2ARIZONA12014

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