Why Did The Mantis Cross The Sidewalk

I'm not sure why he was crossing the sidewalk, but he was, which is why I was able to see him. In the grass he would have been invisible to me.

I knelt low to take this photo, so low that a lady driving by stopped to ask me if I was okay!

Why did he venture across the gray
open expanse of concrete?

Was he going to church to pray,
or looking for something to eat?