Pogonomyrmex (most of them anyway, there is one mountain variety that probably need to hibernate) don't need to be hibernated. I have seen Pogonomyrmex californicus colonies active out in the desert, on even extremely cold winter days with a colder wind. Literally must have been 20 degree wind chill, and Pogonomyrmex californicus colonies were still active. Pogonomyrmex rugosus out in Arizona when I went one Winter, were also all active.
The Pogonomyrmex californicus I found right by the beach seem to hibernate though. Even though it was a lot warmer than out in the desert. So either actually a different species called the same, or completely optional.
Edited by Vendayn, November 24 2016 - 10:47 PM.