The Connectivity Analysis Toolkit (CAT) is a freely available software that provides new tools for both linkage mapping and landscape-level 'centrality' analysis. Conservation biologists have long recognized that natural areas that are linked into networks are often more effective than isolated areas at preserving certain components of biodiversity. Although in the past connectivity usually was considered in a static sense as habitat corridors, we now recognize that planning for connectivity requires incorporating process as well as pattern into conservation planning, and that connectivity...