The role of parasites and pathogens in the evolution of life history traits is of increasing interest to both ecologists and evolutionary biologists. Immunology, which was once studied almost exclusively by immunologists, has become an important area of proximate investigation to animal physiologis[...]

Now in full colour, this Fourth Edition retains all the features of the bestselling prior editions, and provides an integrated study of hormone--behavior--brain interactions, emphasizing a comparative approach. The text contains over 2,000 references and is accompanied by animations, video, sound fi[...]