Data Zone
The site was identified as important in 2013 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Clark's Grebe Aechmophorus clarkii | LC | resident | - | present | A4i |
| Black Rail Laterallus jamaicensis | EN | - | - | present | A1 |
| Bell's Vireo Vireo bellii | LC | breeding | - | present | A1 |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2013) may differ.
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1993 | Bill Williams River | National Wildlife Refuge | 100 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Bill Williams River National Wildlife Refuge (USA). Downloaded from
https://datazone.birdlife.org/site/factsheet/bill-williams-river-national-wildlife-refuge-iba-usa on 23/11/2024.