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
Handbook to the Birds of Australia Handbook to the Birds of Australia The Handbook to the Birds of Australia is a two-volume work published in London in 1865 by the author John Gould. It was published in octavo format (250 x 170 mm), containing some 1290 pages, bound in green cloth with gilt lyrebirds on the front covers and with decorated gilt spines. The two volumes are separately paginated and include no illustrations It is essentially a revision and update of the text originally published with Gould’s monumental illustrated folio The Birds of Australia, which was published in seven volumes between 1840 and 1848. The author