Running Crab Spider on egg case, Berghem, Netherlands

Philodromidae. I noticed a curled up leaf on this tree and had a peek inside to find this female Philodromidae spider guarding eggs. She's about 1cm in size. It took me a lot of tries to get any light inside yet despite all disturbance caused, she remained loyal to her eggs, not once made an attempt to flee. Great mum.

Don't think I can narrow it down to species level, the females are quite variable.