Stalking Piranha Plant is an enemy in the Yoshi series only appearing in Yoshi's Woolly World. They're Piranha Plants that can stretch their necks and they originally debuted in New Super Mario Bros Wii.
Yoshi's Woolly World[]
Stalking Piranha Plant only appear in Yoshi's Woolly World. They're mainly found in Naval Piranha's Sewer. If the stalk is hit, the head will fall next to its body and will rejoin each other shortly after. They can only be defeated by attacking the head.