Hmm, your wife might have a point, but don't these insects take off when a bird approaches? I know constructiontime is over, but perhaps a bird wished to have your container in his nest.
Quite a mindbreaker, Auk.
I heard mudmen are quite common in the swampy area called 'the Netherlands', so perhaps they came with a large group
Heard they aren't very bright either, so possibilities are they confused your cakes with pie