|Juvenile copperhead- click to enlarge|
The copperhead, Agkistrodon contortrix, is in the same genus as the cottonmouth, a.k.a. "water moccasin". They are gray to pinkish tan in color with dark brown bands, narrow on top and wider on the sides. These are best viewed from the side where they resemble Hershey Kisses.
Juvenile copperheads have a bright yellow tail which they are said to use as a lure to attract lizards and frogs.
See snakesandfrogs.com for additional pictures.