Recent Birds at Rio Bosque
Water deliveries to the park from the Roberto Bustamante Wastewater Treatment Plant ended 25 January. These flows might not resume until May. The wetland cells are now dry, as is ~75% of the old river channel within the park.
The park's first spring arrival was a Black-chinned Hummingbird on 28 March. Swainson's Hawks returned 5 April.
The park's pair of White-tailed Kites has not been seen since 7 October 2025. A Cooper's Hawk pair has a recently completed nest.
Currently, only one Burrowing Owl is being seen, sporadically..
The park's wintering American Crows are now mostly gone.
Northern Cardinals continue to be seen along the old river channel within the park.
You can download the current field checklist for the park here.
You can view recent Rio Bosque bird observations posted to eBird .
| Species | Date | Number |
| Black-necked Stilt | 8 Apr | 2 |
| Cooper's Hawk | 7 Apr | 2 |
| White-faced Ibis | 6 Apr | 110+ |
| N. Rough-winged Swallow | 6 Apr | 1 |
| Swainson's Hawk | 5 Apr | 1 |
| Western Screech-Owl | 5 Apr | 1 |
| Crissal Thrasher | 5 Apr | 1 |
| Broad-winged Hawk | 5 Apr | 1 |
| Northern Cardinal | 5 Apr | 1 |
| Green Heron | 29 Mar | 1 |
| Long-eared Owl | 29 Mar | 2 |
| Sharp-shinned Hawk | 20 Mar | 1 |
| Burrowing Owl | 20 Mar | 1 |
