BirdAnalyst
Species · BCR 34 · BBS 2025 Release · 1966–2024

Common Poorwill In Sierra Madre Occidental

All regionsSierra Madre OccidentalAerial insectivores

Common Poorwill in Sierra Madre Occidental has fallen sharply: down 71% on the route-weighted index since 1970.

-71%Since 1970
19Routes In Region
50Years

Notable Signals

long arc declinecomputed index

Common Poorwill has fallen sharply in Sierra Madre Occidental: down 71% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Common Poorwill in Sierra Madre Occidental is projected to fall about 49% by 2029 — from 0.17 in 2024 to a central estimate of 0.09 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±39.9%, with 100% of held-out values landing inside the 95% band.

-49%Change by 2029
0.09Projected 2029 index
0.00–0.5395% range
±39.9%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.120.000.56
20260.110.000.55
20270.100.000.55
20280.090.000.54
20290.090.000.53

Routes In Sierra Madre Occidental

Routes recording Common Poorwill in Sierra Madre Occidental.
DragoonARIZONA32009
San SimonARIZONA22017
PrescottARIZONA11975
PomereneARIZONA12004
Peña BlancaARIZONA12017
PatagoniaARIZONA11999
Skull ValleyARIZONA12024
Forest LakesARIZONA12011
Bartlett ResARIZONA12002
RedingtonARIZONA11996
AmadoARIZONA12022
McnealARIZONA12021
Carr MtnARIZONA11996
SprucedaleARIZONA12017
PortalARIZONA12024
ReserveNEW-MEXICO12023
Vicks PeakNEW-MEXICO12001
Emory PassNEW-MEXICO12024
MagdalenaNEW-MEXICO12016

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