Northern Spotted Owl Whistles (audio) University of California - Davis Share Print E-Mail Loading audio... Caption A northern spotted owl whistles in northwest California. Credit J.Mark Higley: Hoopa Tribal Forestry Usage Restrictions Provide credit. Share Print E-Mail 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.