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
Screaming (music) Screaming (music) Screaming is an extended vocal technique that is mostly popular in "aggressive" music genres such as heavy metal, punk rock, and noise music. In heavy metal, the related death growl vocal technique is also popular. Intensity, pitch and other characteristics vary between different genres and different vocalists. The following is a summary of notable genres in which screaming is often used: Although screams are often suggested in stories performed in the grand opera tradition, they were never performed literally, always being sung. The first significant example of an actual scream in an opera is in Alban Berg's "Wozzeck"