Z heard a noise in the woods and we went to investigate. Turns out that it was a pair of Southern Copperheads! I think this may have been our favorite observation of the trip. We watched them courting for a while and when they split up and went different ways, we got a closer look at one of them.
Found at entrance to cave alongside a black-tailed rattlesnake
Agkistrodon contortrix is a species of venomous snake endemic to North America, a member of the Crotalinae (pit viper) subfamily. The common name for the species is the copperhead. The behavior of Agkistrodon contortrix may lead to accidental encounters with humans. Five subspecies are currently recognized, including the nominate subspecies described here.