Species · BCR 35 · BBS 2025 Release · 1966–2024
Great Blue Heron In Chihuahuan Desert
Great Blue Heron in Chihuahuan Desert has risen sharply: up 56% on the route-weighted index since 1975.
+56%Since 1975
20Routes In Region
30Years
Notable Signals
long arc increasecomputed index
Great Blue Heron has risen sharply in Chihuahuan Desert: up 56% on the route-weighted index since 1975.
Forecast
If the recent trend holds, Great Blue Heron in Chihuahuan Desert is projected to stay roughly flat through 2028, near 0.13 (95% range 0.00–0.39). A 5-year backtest shows a typical error of ±127.8%, with 100% of held-out values landing inside the 95% band.
+9%Change by 2028
0.13Projected 2028 index
0.00–0.3995% range
±127.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.13 | 0.00 | 0.39 |
| 2025 | 0.13 | 0.00 | 0.39 |
| 2026 | 0.13 | 0.00 | 0.39 |
| 2027 | 0.13 | 0.00 | 0.39 |
| 2028 | 0.13 | 0.00 | 0.39 |
Routes In Chihuahuan Desert
| Quitman Canyon 2 | TEXAS | 3 | 2019 |
| Laborcita | NEW-MEXICO | 2 | 2019 |
| Black Gap | TEXAS | 2 | 2019 |
| Presidio | TEXAS | 2 | 2023 |
| San Antonio | NEW-MEXICO | 1 | 1974 |
| Jornada | NEW-MEXICO | 1 | 2023 |
| Bitter Lake | NEW-MEXICO | 1 | 2019 |
| Red Rock | NEW-MEXICO | 1 | 2023 |
| Mesilla | NEW-MEXICO | 1 | 1997 |
| Pinon | NEW-MEXICO | 1 | 2001 |
| Columbus | NEW-MEXICO | 1 | 2009 |
| Laborcita 2 | NEW-MEXICO | 1 | 2022 |
| Sunshine Wll | NEW-MEXICO | 1 | 2005 |
| Comstock | TEXAS | 1 | 2006 |
| Longfellow | TEXAS | 1 | 1975 |
| Devils R Cyn | TEXAS | 1 | 2015 |
| Toyahvale | TEXAS | 1 | 2001 |
| Quitman Cyn. | TEXAS | 1 | 2000 |
| Canutillo | TEXAS | 1 | 2016 |
| Dove Mtn. | TEXAS | 1 | 2006 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.