Marsh Dalek
From Tardis Wiki, the free Doctor Who reference
The Marsh Dalek was a variation on the standard Dalek model.
Often employed to patrol the swamps of Gurnian, the Marsh Daleks were structurally different from the standard model. Resembling cans on thin stilt legs, the Marsh Daleks lacked the common manipulator arm, having a gunstick positioned in the centre of its cylindrical body. These Daleks were responsible for keeping the local wildlife under control. (DWM: The Dalek Book)
The creatures of Gurnian proved to be a match for the Daleks as at least one Marsh Dalek had fallen prey to a horrorkon. (DWM: The Dalek Book)
