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 Skies Belong to Us The Skies Belong to Us The Skies Belong to Us: Love and Terror in the Golden Age of Hijacking is a 2013 narrative nonfiction book by the American author Brendan I. Koerner. It is a history of the "golden age" of aircraft hijacking in the United States from the first incident in May 1961 through January 1973. Hijackings during this period took place as often as once a week, with about 160 incidents in total (most were to Cuba). The book looks at the causes of the epidemic, some of the more famous ones and follows in-depth the story of