Stoat droppings are long, twisted and with tapering ends.
Droppings are long (40–80 mm in length), thin, taper towards a twist at each end and can be curled. They are hard and black when dry and are often in conspicuous positions e.g. on top of a rock (this is because stoats use them for territorial marking). Droppings will be full of feathers, fur, bones, or insect cuticle.
Drawing: by Sonia Frimmel.