Very low light just after sun was above horizon so this is best of poor photos. Two copperheads engaged in territorial contest on trail.
Northern Copperhead observed at Snake Road at Larue Pine Hills in Shawnee National Forest in southern Illinois.
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.