The value of the IUCN Red List for conservation Ana S.L. Rodrigues, John D. Pilgrim, John F. Lamoreux, Michael Hoffmann, Thomas M. Brooks Trends in Ecology & Evolution Volume 21, Issue 2, Pages 71-76 (February 2006) DOI: 10.1016/j.tree.2005.10.010 Copyright © 2005 Elsevier Ltd Terms and Conditions
Figure 1 Species richness of globally threatened birds (n=1208) and amphibians (n=1856), mapped on an equal-area (∼3113km2) hexagonal grid. Modified, with permission, from [40]. Trends in Ecology & Evolution 2006 21, 71-76DOI: (10.1016/j.tree.2005.10.010) Copyright © 2005 Elsevier Ltd Terms and Conditions