A short while back, I wrote about the non-native Chinese Mantis, HERE. One tends to see far more of those than the much more diminutive native Carolina mantids. I have heard it postulated that the larger more aggressive introduced mantids will displace their native brethren. Could be; I certainly see few of the Carolinas and scads of the Chinese.
Carolinas are much smaller than the Chinese mantids; perhaps half that size. They're also a pleasing gray color, dusted and dappled with ashy blotching.
I believe the one above is gravid, judging by her swollen abdomen. Hopefully her mate made it out alive. Some estimates have it that up to one-quarter of males perish shortly after consummating their relationship with the female. The smaller, weaker male is set upon, and eaten by the cannabalistic female mantis. I don't like that, personally. I find it rather rude.