Gulls: A Guide to Identification. 2nd Edition

ISBN: 9781408138311 出版年：2010 页码：353 P J Grant Bloomsbury Publishing

This second edition of Peter Grant's guide has been extensively revised and has been reset throughout. Importantly, a further eight species of gulls occurring on tof Canada and the USA haThe book now covers 31 species and has been increased in leng352 pages. More than 280 new photographs have been added or substituted, bringing the total to 544, including 79 photographs for the eight North American additional species. The great increase in interest in gull identification since the publication of the first edition (and the author's series on that topic in British Birds) has helped bring much new information to lighsome revision was made to almost every text page aidentification drawings were improved in some way; in addition, changes were made distribution maps. These revisions and improvements were often quite minor, but others were substantial and important (see the author's Introduction). Until recently gulregarded as a difficult group and identification and ageing was often inaccurate or uncertain. This was largely due to the complexities of immature plumages, which of necessity were generally unrepresented in standard field guides. Birdwatchers need no longer be deterred or confounded by that deficiency. Tthem the opportunity to advance their skill in field identification by accepting the challenge rather than shrinking from the difficulties.