I got an announcement yesterday, that Black-throated Loon was seen on lake Veľký Draždiak in Petržalka, Bratislava. I missed it last week on Danube so I wanted to make my yearlist tick today. I persuaded my colleague to join me and we checked this site this morning. Black-throated Loon (Gavia arctica) was there all the time. It was intensively diving first hour, but later there were some nice opportunities to see this unusual bird.