From the Super Mario Wiki
Short Fuses are a sub-species of Grinders found in the Yoshi series. They're almost always found climbing vines, but there are some occasions that they'll go on the ground. Short Fuses drop missile-like bombs or Needlenoses onto Yoshi. They appear in Super Mario World 2: Yoshi's Island, Yoshi's Island: Super Mario Advance 3, Yoshi Touch & Go and Yoshi's Island DS.