Mountain chiffchaff Caucasus, but interbreeding occurs rarely, if ever. The mountain chiffchaff differs from "tristis" in vocalisations, external morphology and mtDNA sequences. Its two subspecies appear to be distinct vocally, and also show some difference in mtDNA sequences. Mountain chiffchaff The mountain chiffchaff or eastern chiffchaff ("Phylloscopus sindianus") is a species of leaf warbler found in the Caucasus ("P. s. lorenzii") and Himalayas ("P. s. sindianus"), and is an altitudinal migrant, moving to lower levels in winter. The nominate subspecies is similar to the Siberian chiffchaff, but with a finer darker bill, browner upperparts and buff flanks; its song is almost identical
A Photographic Guide to the Birds of Indonesia Berkeley Books Pte Ltd. The second edition involved a total revamp of the material; a new checklist was used on the basis of "The Clements Checklist of Birds of the World 6th Edition" from 2007. This list has 1,605 bird species for Indonesia, while the 1992 list had 1,534. It also uses the ‘buntings last’ sequence which means that the Indonesian book now uses the same sequence as the companion volume "A Photographic Guide to the Birds of Southeast Asia". However, while "Southeast Asia" came out in 2012 with just a new cover and imprint, "Indonesia" came out that year