30 minutes of evening ambiance featuring my favourite bird the common swift apus apus. Recorded on the 4th of April 2017 at about 7 pm just before sunset. This recording took place at my grandmother's back yard. There are plenty of common swifts in her area. The recording is mono. I used my nexus5 mobile phone to record it and the hi-q mp3 recorder pro which is able to record raw audio without any noise cancellation. I also used goldwave to boost the volume of the recording by 7 db. This phone was able to record in stereo when it received the 5.1 update of android lollipop, but this functionality went away when android 6.0 marshmallow came out.