Siberian chiffchaff to be a full species due to its distinctive plumage and vocalisations, being similar to "P. s. sindianus" in these respects. Common chiffchaffs (of the nominate race) and Siberian chiffchaffs do not recognize each other's songs. Pending resolution of the status of the form "fulvescens", which is found where the ranges of common chiffchaff (of the race "abietinus") and Siberian chiffchaff connect and may or may not be a hybrid between these, "tristis" is maintained in "P. collybita" by most checklists. Siberian chiffchaff Siberian chiffchaff ("Phylloscopus (collybita) tristis") is a leaf-warbler which is usually considered a subspecies of the common
A Photographic Guide to the Birds of Indonesia with one or more photographs as well as a distribution map. The taxonomy and nomenclature in the first edition followed "The Birds of Indonesia: a Checklist" by Peter Andrew from 1992; this was the most used checklist at the time, using the so-called ‘crows-last’ sequence. The book was a companion to "A Photographic Guide to the Birds of Southeast Asia" which was published the previous year, in 2000. However, this volume used a different checklist as a reference with a ‘buntings last’ sequence. "A Photographic Guide to the Birds of Indonesia" was reprinted several times during the following years, but