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
The Slater Field Guide to Australian Birds The Slater Field Guide to Australian Birds The Slater Field Guide to Australian Birds is one of the main national bird field guides used by Australian birders. The guide was first published in 1986 in Sydney by Rigby Publishers and authored by Peter Slater and other members of his family. It is 215 mm high by 113 mm wide and weighs 440 g. The imprint page asserts copyright of the paintings for Peter Slater, of the text for Pat Slater, and of the maps for Raoul Slater. In 1970-74 Slater had produced a two-volume guide to Australian birds which was