Claus König & Friedhelm Weick say in
Owls of the World (2008): “The first (1999) edition of this book was well received and is now out of print, which has encouraged the publishers to ask us to prepare this revised and enlarged second edition. The text and bibliography have been brought up to date and new colour plates have been added, to reflect changes in the taxonomic literature and a number of species entirely new to science. Moreover, all 64 of the original colour plates have been revised and corrected where necessary, and eight new plates added. The chapter on DNA evidence has been updated by Michael Wink and colleagues … We owe many thanks to our colleague Dr Jan-Hendrik Becking for his highly appreciated contributions to the first edition of 1999, which have been incorporated into this new edition.”
A similar comprehensive work is
Owls of the World - A Photographic Guide by Heimo Mikkola (second edition 2013).
It's all really simple here. "A Guide to the Owls of the World" (1999): This version was the first in the series and contains detailed descriptions of all known owl species at the time of publication. "Owls of the World" (2008): This is an updated and expanded edition. It includes new data obtained over almost a decade of research, as well as updated taxonomy and distribution information for owls. I have even found a newer version and started reading it. For this I even found a writing service for college I used
https://ca.papersowl.com/admission-essay-writing-service so that nothing distracts me. In the new version, everything is completely different. When I finish reading, I will report this book to the forum. I can only say that the new version is from 2010.
