Found a few of these on the house wall (Bridgwater/Somerset). They seem to be empty so I wondered if they were parasitised? Any idea on what type of caterpillar and/or parasite? #WildlifeUK , #NatureUK , #InvertebratesUK , #InsectsUK , #CaterpillarsUK, #MothsUK , #ParasitesUK