![]() ![]() After that, he says, you should take a look around your foundation, roof, and garage doors, sealing any gaps wider than half an inch.Ĭorrigan suggests sliding a #2 pencil underneath any exterior doors if it fits, so can rats and mice. Eliminate any food and water sources in your yard, move wood piles away from your home, and clear dense vegetation from around your foundation. “Prevention is key, and it starts with eliminating harborage, or areas that are conducive to rats,” Williams explains. (The secret between telling the difference between cockroach poop and food, he notes, is if it sticks to vertical surfaces like cabinets and walls only poop does that.) How do you treat a rat infestation? ![]() (Unfortunate, but true.)Ĭockroaches, meanwhile, leave droppings that look like ground coffee or black pepper, Corrigan says-much smaller than rat poop. It actually looks more like another food item, he says: chocolate sprinkles. “ Mouse poop is small, much smaller than that of rats,” Corrigan explains, usually around less than a quarter of an inch. mouse poop? There are a few key differences between both types of droppings. brown rats) leave “larger droppings that are blunt at the ends, or more burrito-shaped.” How do rat droppings differ from those of other pests? ![]() black rats) leave droppings with “a slight curve with pointed ends, or more banana-shaped,” Williams says, while Norway rats (a.k.a. You might even be able to tell which type of rat has invaded your home. “If you see anything that looks like raisins, coffee beans, or big pieces of rice where they should not be,” explains Bobby Corrigan, Ph.D., an urban rodentologist based in New York City, it’s probably rat poop. It’s also possible to mistake rat poop for common food items. NY State IPM Program at Cornell University // Flickr ![]()
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