The Boyali area in Eğirdir Lake (Turkey) is a rich habitat according the medicinal leech (Hirudo verbana) populations. This video was recorded in November 2013 in there. Actually the leech follows the video recorder (me) thinking any host for feeds on its. For this purpose, it crawled towards me a long time, and sometimes it swimmed when the macrophytes density was decreased on the surface of lake. As such, it was thought that the medicinal leeches have a capability to following their preys.