books.google.co.in - Synthesizing studies of parental care in a wide variety of animals, this book is the first attempt to provide general answers to the following important questions: Why does the extent of parental care vary so widely between species? Why do only females care for eggs and young in some animals, only males...http://books.google.co.in/books/about/The_Evolution_of_Parental_Care.html?id=uRS2WusqW8kC&utm_source=gb-gplus-shareThe Evolution of Parental Care: