A food worker notices small, pellet like black droppings in the corner of a food storage room. Which type of pest is the most likely cause of these droppings?

The presence of small, pellet-like black droppings in a food storage room is commonly indicative of rodent activity, particularly from mice or rats. Rodent droppings are typically small and cylindrical, resembling pellets, and can vary in size depending on the type of rodent. Mice droppings are about 1/8 to 1/4 inch long and have pointed ends, while rat droppings are larger, approximately 1/2 inch in length, and have blunter ends.

In addition to droppings, other signs of rodent infestation may include chewed food packages, gnaw marks, and nesting materials. It's crucial to identify and address the issue promptly, as rodents can contaminate food and spread diseases. Hence, the most likely cause of these droppings in the food storage room is a rodent, most likely from mice or rats.