Bat for ID (Bulgaria: Rodopi Mountains) (1 Viewer)

I would be grateful if someone could give me an ID for this bat. The photo was taken in July 2008 in the roof of my house in the Bulgarian Rodopi Mountains. That summer I saw 2 bats hanging in the roof, then in the summer of 2009 there were about 10 bats. This year the numbers have increased dramatically to 50+ and it appears it is a breeding colony as there were several bats hanging with young attached.

Looks like a Horseshoe of some kind!!

Nice pic it's difficult to guess the size but it looks like Lesser Horseshoe bat Rhinolophus hipposideros.