![]() ![]() Size of entry holes (often 1 1/2 inches in diameter or less for mice, 2 inches or larger for rats) or tooth marks can be used to distinguish rat from mouse gnawing. Fresh accumulations of wood shavings, insulation, and other gnawed material indicate active infestations. Gnawing may be visible on doors, ledges, in corners, in wall material, on stored materials, or other surfaces wherever rats are present. Smudge marks (rub marks) may occur on beams, rafters, pipes, and walls as a result of oil and dirt rubbing off rats’ fur along frequently traveled routes. ![]() Rats memorize pathways and use the same routes habitually. Runs or burrows may be found next to walls, along fences, next to buildings, or under bushes and debris. ![]() Urine stains may occur along travelways or in feeding areas. Urine, both wet and dry, will fluoresce under ultraviolet light. A tracking patch made of flour can be placed in pathways overnight to determine if rodents are present. Tracks, including footprints or tail marks, may be seen on dusty surfaces or in mud. They may be as large as 3/4 inch (2 cm) long and 1/4 inch (0.6 cm) in diameter. Droppings may be found along runways, in feeding areas, and near shelter. The presence of rats can be determined by a number of signs described below. How Do I Know if Rats are on my Property? Please click hereto download our informational Rat Brochure. ![]()
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