Which sign indicates the path of rodent movement and origin?

Which sign indicates the path of rodent movement and origin?

• A. Tracks
• B. Rub marks and smears
• C. Droppings
• D. Vocalizations

Answer: (B)

Rub marks and smears show the route rodents travel and where they’re coming from. As rodents move along walls, baseboards, and other surfaces, oils from their fur and skin get transferred, leaving greasy, discolored streaks. These marks align along travel paths and often point back to entry points or nests, giving a clear sense of both the route and the origin. Tracks can indicate movement but require a suitable dusty surface and don’t always reveal origin as clearly, droppings indicate presence but not necessarily the travel path, and vocalizations aren’t a practical field sign.

Rub marks and smears show the route rodents travel and where they’re coming from. As rodents move along walls, baseboards, and other surfaces, oils from their fur and skin get transferred, leaving greasy, discolored streaks. These marks align along travel paths and often point back to entry points or nests, giving a clear sense of both the route and the origin. Tracks can indicate movement but require a suitable dusty surface and don’t always reveal origin as clearly, droppings indicate presence but not necessarily the travel path, and vocalizations aren’t a practical field sign.