This made me wretch.. something about the parasite really doesn't sit well with me.
Apparently the mantis is infected with a horse hair worm, and looking it up I found this out:
In Spinochordodes tellinii and Paragordius tricuspidatus which have orthopterans as their vector, the infection acts on the insect's brain and causes it to seek water and drown itself, thus returning the nematomorph to water.
If I created that I wouldn't look at it and say "it was good".
Its things like this that should be studied in the creation book, not how amazing a peacock is