1 The Mathematics of Ecological Diffusion * 2 The Basics of Diffusion * 3 Passive Diffusion in Ecosystems * 4 Diffusion of 'Smell' and 'Taste': Chemical Communication * 5 Mathematical Treatment of Biological Diffusion * 6 Some Examples of Animal Diffusion * 7 The Dynamics of Animal Grouping * 8 Animal Movements in Home Range * 9 Patchy Distribution and Diffusion * 10 Population Dynamics in Temporal and Spatial Domains * References * Author Index * Subject Index