Mountain chiffchaff 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 to the common chiffchaff, but the call is a weak "psew". "P. s. lorenzii" is warmer and darker brown than the nominate race; it is sympatric with common chiffchaff in a small area in the Western
The Sibley Guide to Birds North American and one for the eastern half. The guide was favorably reviewed by "The New York Times", "The Wilson Bulletin" (now "The Wilson Journal of Ornithology"), and the journal "Western Birds". The Sibley Guide to Birds The Sibley Guide to Birds is a reference work and field guide for the birds found in the continental United States and Canada. It is written and illustrated by ornithologist David Allen Sibley. The book provides details on 810 species of birds, with information about identification, life history, vocalizations, and geographic distribution. It contains several paintings of each species, and is critically acclaimed