They have to be up somewhere around your area I would think. They grow off the base of oaks and can range in color from light as in my pic to Gray, brown, to almost black. Last year my ratio was about for every 40 big oak trees I checked I was finding one hen. In a good year the ratio is much better than that. So finding a good stand of Oaks is nice verses walking miles in a mixed hardwood forest looking for oaks. So it's basically Oak tree hunting verses mushroom hunting. Find the big Oaks and you will find the Hens.
I found one yesterday that was old and rotten. In a different woods I found 2 that I left to grow. People say they grow off a couple other trees other than Oaks. However, I have never found one growing off anything but an oak tree.
Good luck,
Latt