Taxi whistle 2 The close relative of a similar sound that's also somewhere on this website. Free ringtone (Creative Commons) mp3 m4r ogg
Sedulous Some sounds are more industrious than others, and this is one of them. Free ringtone (Creative Commons) mp3 m4r ogg
Big clock ticking A clock in a hurry, time is ticking away Free ringtone (Creative Commons) mp3 m4r ogg
Bird vocalisation A bird vocalisation that sounds quite melodious, except it's synthetic. Free ringtone (Creative Commons) mp3 m4r ogg