A guide to help unravel the difficulties commonly encountered by students of animal behaviour. Clear definitions and explanations for key concepts provide an ideal entry into longer texts and the literature that students taking short or modular courses refer to in the library. This book concentrates on clarifying the key issues in animal behaviour; outlines clearly the critical points of contention; tackles difficult points that heavier texts gloss over; new chapters on consciousness, including animal suffering and application of animal behaviour studies to human behaviour'; includes new work on adaptation, motivation and evolutionary models; Author is Secretary-General of the International Ethological Congress 1995-9.