Species · Arizona · BBS 2025 Release · 1966–2024
Common Poorwill Population Trend in Arizona
Common Poorwill in Arizona has collapsed: down 80% on the route-weighted index since 1970.
-80%Since 1970
38Routes In State
51Years
Notable Common Poorwill Trends in Arizona
long arc declinecomputed index
Common Poorwill has collapsed in Arizona: down 80% on the route-weighted index since 1970.
Common Poorwill Population Forecast in Arizona
If the recent trend holds, Common Poorwill in Arizona is projected to rise about 28% by 2029 — from 0.11 in 2024 to a central estimate of 0.15 (95% range 0.00–0.47). A 5-year backtest shows a typical error of ±246.9%, with 100% of held-out values landing inside the 95% band.
+28%Change by 2029
0.15Projected 2029 index
0.00–0.4795% range
±246.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.16 | 0.00 | 0.48 |
| 2026 | 0.15 | 0.00 | 0.47 |
| 2027 | 0.15 | 0.00 | 0.47 |
| 2028 | 0.15 | 0.00 | 0.47 |
| 2029 | 0.15 | 0.00 | 0.47 |
Common Poorwill Survey Routes in Arizona
| Organ Pipe | 5 | 2021 | 2003 |
| Dragoon | 3 | 2009 | 1995 |
| Laguna | 3 | 1968 | 1968 |
| Ajo | 3 | 2001 | 1970 |
| Bates Well | 3 | 2017 | 1995 |
| Gila Bend | 3 | 2009 | 2001 |
| Cabeza Priet | 3 | 2015 | 2015 |
| Wikieup | 2 | 2019 | 1992 |
| San Simon | 2 | 2017 | 1974 |
| Cutter 2 | 2 | 2018 | 2016 |
| Alamo Res. | 2 | 2019 | 2000 |
| Navajo Trail | 2 | 2024 | 2015 |
| House Rock | 1 | 2018 | 1992 |
| Portal | 1 | 2024 | 1975 |
| Squaw Peak | 1 | 1969 | 1969 |
| Prescott | 1 | 1975 | 1975 |
| Vicksburg | 1 | 1968 | 1968 |
| New River | 1 | 1975 | 1975 |
| Florence | 1 | 1972 | 1970 |
| Pomerene | 1 | 2004 | 1968 |
| Lukeville | 1 | 1977 | 1976 |
| Peña Blanca | 1 | 2017 | 1980 |
| Patagonia | 1 | 1999 | 1979 |
| Palo Verde 2 | 1 | 2015 | 2015 |
| Toroweap | 1 | 2021 | 1994 |
Common Poorwill Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.