A mystery... Animal on roof lifting roof tiles to get at wasp nests? Any others have similar problem?

Hi - we have a rustic finca in Enguera. Twice now, when visiting, roof tiles have been lifted with the remnants of wasp nests scattered all over. This last time, about 50 tiles had been lifted !  Spanish neighbours took photos and think it might be "an animal" - but what kind of animal would go onto a roof and be strong enough to lift old terracotta tiles for the wasp nests? We've heard pitter patter of feet in the roof space before - but just thought this might be bats.  Worrying about long term damage/rain getting in etc if it happens again. We've had the property 8 years now and it's happened 3 times in the last 8 months....  any advice or thoughts very welcome. Thank you. 

Sounds like Badgers. They love Wasp lavae and can climb to get at the nests. They are one of the few mammals that do eat Wasps along with Wolves.  Badgers are quite common throughout Spain and the Iberian Wolf is restricted to Northen Spain - so it has to be Badgers.

Possibly large feral cats, as my brother has had this in Portugal and they try to get to birds nests under the tiles as well, and he has seen them doing this. Make sure the tiles are not loose.

Pine Martins likely

Thanks for the responses. A year later and the critter whstever it is is still up to its tricks. Trouble is we arent there all the time so havent a clue whether it might be a badger, large feral cat or pine martin. Will check with coperativa if any of those animals live in the Enguera mountains. Thanks for the replies