(Dead) Bugs on plane

Hi! I just bought a beautiful set of framed pinned insects on my holiday in Czech Republic. I would like to know if some of you could advice me if the security people would confiscate them in the airport in my way home to Spain. They are coming with me in the plane cabin on a backpack and I'm not sure if I will have problems but I couldn't leave them in the shop :')

Thanks in advance!