Screechings from a group of Alpine swifts, with Collared Dove cooings and wing flutterings in background. Recorded in downtown Saluzzo (Piamonte, N Italy), using PCM-M10 recorder with internal mics.<br/>20160817_alpine.swift.02.wav<br/>聲道：2<br/>類型：wav<br/>birdsong、birds、alpine-swift、screeching、nature、field-recording、mountains<br/>鳥鳴聲、鳥類、高山迅速、尖叫、性質、現場記錄、山<br/>資料來源：freesound ( https://freesound.org )