Praying Mantis' in Mason Bee Nesting Box?
While harvesting Mason Bee cocoons today (09/23/2019) from my Mason Bee nesting box, I noticed small grass-like protrusions sticking out of some of the slots (photo attached). After pulling out the grooved mason bee cocoon boards, it looks like there are many small (juvenile?) mantises (photo attached) in those slots, and maybe some eggs in 1-2 slots. I did not want to disturb them if they are mantises. After harvesting the mason bee cocoons, I returned the nesting box to its outdoor location adjacent to my vegetable garden. Normally, I would have cleaned and sanitized the nesting box and stored it until time to place the cocoons outside next year. Three questions: Are they mantises? And if so, what is a good way to ensure their survival besides leaving them alone? Or are they something else entirely?. (Sorry the pictures aren't better. Only have my iPhone camera.)