Kirtland's Warbler (IMAGE) Penn State Caption The breeding habitat of Kirtland's warblers is limited to young jack-pine forests in Michigan. The species nearly went extinct in the 1970s due to threatened habitat and nest parasitism, but populations recovered thanks to intensive, targeted management efforts. Credit Nathan Cooper Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. Adaptations must be shared under the same terms. License CC BY-NC-SA 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.