Singing Blackbirds

A very focused recording of birds singing in a large bush. I have become quite well accustomed to identifying birds now from their songs. To my ears, we have the Eurasian Blackbird dominating this recording. There are cheeky little interludes from Robins and also extremely fleeting moments of Song Thrush's too. However, the Blackbirds really took center stage here. I hope you enjoy this audio. If you do happen to hear anything other than the bird species I have mentioned, I would be extremely interested to know what you hear. There's an obscure whistle in the background at 03:41 that I can't identify and I find that sound particularly fascinating.