California gnatcatcher (IMAGE) San Diego State University Caption The California gnatcatcher was at the center of a decades long fight because it was designated as a threatened species. A new approach to genomic species delineation put forth by evolutionary biologists led by Jeet Sukumaran at SDSU could impact policy and lend clarity to legislation for designating a species as endangered. Credit Tom Benson, https://www.flickr.com/photos/40928097@N07/48246028557 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.