Big Oaks National Wildlife Refuge

IBA Criteria

Year of most recent IBA criteria assessment: 2009

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Henslow's Sparrow Passerculus henslowii LC breeding 2004 629 breeding pairs A1
Cerulean Warbler Setophaga cerulea NT breeding 2003 51 breeding pairs A1

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Big Oaks National Wildlife Refuge. Downloaded from on 16/01/2021.