This book uses exotic birds as a case study to understand the science of the invasion process, from the reasons why humans choose to move some species and not others, to how successful invaders interact with the new environment, and even evolve there. In this book, three leading experts combine theory with a rigorous analysis of the evidence to ask what are the causes and consequences of avian invasions. And they succeed formidably. The book is a must read for anyone interested in biological invasions, and will inspire students and academic researchers alike. It is informative, comprehensive, rigorous, stimulating and highly readable.