What shape best describes Norway rat droppings?

The shape that best describes Norway rat droppings is capsule-shaped. This is a distinctive characteristic of Norway rat droppings, which are typically about 1/2 inch long, with blunt ends and a smooth texture. The capsule shape helps in the identification of this type of rodent, which is useful for pest control professionals in recognizing signs of infestation.

In contrast, other shapes do not accurately represent Norway rat droppings. For instance, cylindrical droppings would imply a more uniform roundness throughout, which does not match the flattened, capsule-like structure of Norway rat droppings. Spindle-shaped droppings would suggest a tapering form, which is also not indicative of this species. Similarly, block-shaped droppings would appear more square or rectangular, which is not consistent with the smooth, uniform look of Norway rat droppings. Thus, the capsule shape is the most correct and identifiable feature when determining the type of droppings left by Norway rats.