Hey I can't really see his face clear enough but the pattern in the front tells me he is a copperhead. What has me doubting my opinion is the long slender tail is like a banded water snake. They look very similiar to a copper head in pattern and will flare their heads out like a viper when being defensive. A copper head has the typical pits like the timber rattler and the very distinct diamond shaped head. Depending upon the age and location the patterns can vary big time in the copperhead species. Eliptical eyes are a give away as well.
Here is a picture of some copperheads I saw that were mateing a female. Several males were in the rocks. You can see the blunt tails and diffrent patterns in these vipers.
Worst bite out there is the copperhead but the banded water snake is 10x more aggresive.
Now we are all confused