Well you learn something new every day.
Have a guess at what's in the picture below and then check out this link.
I'm used to these for great forms of camouflage... the praying mantis family... we get all kinds of camoflage varieties where I grew up.
And the best I have seen in spiders is this...
I've typically bumped into the above while clambering about the pecan nut trees picking pecan nuts.