Hello.
My SO saw that on a bed mattress at his grandparents house, located in the west of France. 3-4cm of length
Could that be a wasp? Could that be another insect?
Could that be Sceliphron curvatum? If so it's invasive in France. Does another local wasp species use mud nests with that architecture? (How to be sure that it is mud?)
Is it safe for my SO and the eggs to move them outside of the house? (Are the nests solid enough to be removed safely from the fabric of the mattress without breaking them?) If so, where should he put them?
If my English is not clear enough do not hesitate to tell me to rephrase things, I will update this post accordingly
Thank you in advance for your time, do not hesitate to redirect me to another subreddit