With an abundance of identification guides available on bookstore shelves, as well as web sites dedicated to the finer points of field identification, there is no shortage of information available to today's birders wanting to challenge themselves with difficult groups of birds. While plenty of references are available for beginners learning how to use field marks and for experts studying molt schedules and specific feather tracts, there is little information to help intermediate birders to learn how to look at birds. Advanced Birding aims to fill that gap; rather than providing a reference for advanced birders, this book is about becoming an advanced birder.