A walker was given a shock when she spotted a man staring at her from the thicket of Carr Wood - without any trousers on.
The flasher was reported to police by a 41-year-old woman at 2.10pm on Monday, December 30.
The victim was walking home through the woods near Butterley Hil when she spotted a white male between 35 and 40 years old with short brown hair and a black hooded top. He was standing in the woodland, facing the pathway. The bottom half of his body was exposed and he appeared to touch himself in a private area, though he did not speak.
Police are appealing for witnesses to call 101.