Which small mammal is unharmed having eaten a venomous snake?

The small mammal known for being unharmed after eating a venomous snake is the eastern kingsnake (Lampropeltis getula). This non-venomous snake has a resistance to the venom of various snakes, including rattlesnakes and copperheads. It preys on these snakes, consuming them without suffering any ill effects. This unique adaptation allows the eastern kingsnake to thrive in environments where venomous snakes are present.