Common swift that resemble a crescent or a boomerang. Their call is a loud scream in two different tone pitches, the higher of which issues from the female. They often form 'screaming parties' during summer evenings, when 10–20 swifts will gather in flight around their nesting area, calling out and being answered by nesting swifts. Larger "screaming parties" are formed at higher altitudes, especially late in the breeding season. The purpose of these parties is uncertain, but may include ascending to sleep on the wing, while still breeding adults tend to spend the night in the nest. Swifts may nest in former
Musical Evenings in St Donatus the hot Zadar summer nights each year. During almost half a century of its existence, Musical Evenings in St Donatus as a musical manifestation has undergone many conceptual changes. During the first festival summers the aim was to bring to Zadar prominent performing artists from all over the world as well as Croatia but also to strengthen local performing forces, allowing them to equally participate in the programme. Owing to the Yugoslav wars, the Evenings were not renewed until 1994. Musical Evenings in St Donatus Musical evenings in St Donatus () in Zadar, Croatia is an international music festival, it