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
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