A worldwide community photographing and learning about wildlife
Gonatista grisea
Not sure if it is brown/black and cover with some type of green mold; or if that is its protective camouflage. It is a fairly large little creature.
It was observed a a County nature Preserve clinging to the screening of the entrance to the Ed Center. It was not a rapid mover. It did not mind getting close to take photos.
Just looked at whatsthatbug.com. It had a couple of photos that seem to match your suggestion and my photos I took.
Thank you
Also called Grizzled Mantis but I don't know why. Tiny pic Ric... are you using a phone?