This mantis was found on a screen at night. It looked to have a beautiful pattern of silver and black in the artificial light. In daylight, it almost disappears when on the bark of a Turkey Oak (Quercus laevis) tree in Central Florida. It was between 2 1/2" to 3" long.
Looks like Gonatista grisea - https://phostracks.com/2015/05/18/the-grizzled-mantis-gonatista-grisea-28-june-2013/
