Speke's Weaver (IMAGE) University of York Caption Researchers found that using highly diverse fire types increases the diversity of mammals and birds in wet savannas, including the Speke's weaver (pictured), a range-restricted species. Credit Dr. Colin Beale, University of York 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.