Northern Spotted Owl (image) University of New Mexico, Long Term Ecological Research (LTER) Network Share Print E-Mail Caption Northern spotted owls and their prime habitat, old-growth forest, have been the subject of intensive investigation at the Andrews Forest LTER site for 40 years. This research has been a foundation for transformation of federal forest policy from an emphasis on timber production to protection of biodiversity. Credit A. Levno, US Forest Service Usage Restrictions None 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.