Actually very rough recording, because I was woken up by the birds, grabbed a recorder (zoom h1) from my bag and recorded them from the birds from the window. :)
燕子在morning.flac
聲道：2
類型：flac
birdsong、birds、bird、chirp、morning、swallows、spring、nature、field-recording
鳥鳴聲、鳥類、鳥、嘰嘰喳喳、早上、燕子、彈簧、性質、現場記錄
資料來源：freesound ( https://freesound.org )