There's a Robin extreme left throughout (typical short indecisive phrases), possibly another Robin (or a Wren) giving agitated 'ticks' on the right. A Chaffinch stage right, not yet in full summer song, and I thought possibly a Whitethroat mid-left near the end. I'll let Reinsamba shoot me down in flames.
This one I'll recommend to a friend who took a trip with his bike to the Ucraine from Germany, but had no minidisc-recorder or other equipment to record anything. These samples with sounds and announcements from anywhere in the world are sheer beauty. I'll go and add some stuff I recorded in poor old Germany later this year. If you should stay here at freesounds for the first time, don't forget to bookmark this unbelievable website.