C. Hilary Fry & Kathie Fry 
Kingfishers, Bee-eaters and Rollers [PDF ebook] 

A review of the 123 species of kingfisher, bee-eater and roller. Dazzling in their beauty, many of the 123 species of kingfisher, bee-eater and roller are very poorly known. This reference provides a review of the group showing every species, all the main races and most sex and age variations. Text and 40 colour plates are closely coordinated with emphasis on behaviour, field characters and identification. Colour maps showing breeding and wintering ranges are also included.