I couldn't sleep last night so was wandering around my flat when at 2:00 a.m. I heard the birds begin to sing. I made a little film of it  which only gets a short blast of their cheery song!   My batteries ran out.  And as sod's law would have it they went full throttle after that - until about 4:00.  I thought they were supposed to be asleep at that hour of the night - but it was nice to have company! 

https://www.youtube.com/watch?v=oGbFEoF6ij4&feature=youtu.be