Common chiffchaff one of the first avian signs that spring has returned. Its call is a "hweet", less disyllabic than the "hooeet" of the willow warbler or "hu-it" of the western Bonelli's warbler. The song differs from that of the Iberian chiffchaff, which has a shorter . However, mixed singers occur in the hybridisation zone and elsewhere, and can be difficult to allocate to species. When not singing, the common chiffchaff can be difficult to distinguish from other leaf warblers with greenish upperparts and whitish underparts, particularly the willow warbler. However, that species has a longer primary projection, a sleeker, brighter appearance
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