Mouse or rat?
In Egyptian Arabic, one word covers just about anything with a tail that scurries. In practice, three species get into homes and warehouses, and each one needs a different approach:
- House mouse: 13 to 18 cm long including the tail, about 15 grams, with large ears for its body size. It lives inside the house itself and rarely goes more than 9 meters from its nest.
- Norway rat (sewer rat): heavy, 200 to 500 grams, with a blunt snout and a tail shorter than its body. It digs burrows beside building foundations and under clutter, and it swims well in sewers.
- Roof rat (black rat): slimmer and lighter, with a pointed snout, large ears and a tail longer than its head and body combined. It is a skilled climber and likes storage lofts, false ceilings and trees.
Which one you have changes the work. With a house mouse we work in a small area around its nest, and the traps go close together. A Norway rat may travel 30 to 150 meters to feed, which means monitoring starts outside the building. A roof rat means sealing the high openings too, not just the ones at floor level.
How do rats and mice get into the house?
A house mouse can get through a gap 6 mm wide, about the width of a pencil. A young Norway rat can squeeze under a door with a gap of about 1.3 cm. If you can fit a finger into a crack, a rodent can use it.
The entry points we find most often in Egyptian homes are the gap around the sink or washing machine pipe, a floor drain with a broken or missing cover, the space behind the fridge and the cooker, and the gap under the front door or the air shaft door. Norway rats can also come up through a bathroom floor drain or a broken waste pipe, because they swim through the sewers. Roof rats climb the pipes on the front of the building and the satellite dish cables, then get in through the air shaft window or the air conditioner opening.
Sealing a gap has to be done properly. Coarse steel wool blocks a small gap, but on its own it rusts over time, so we fix it in place with filler or foam. Larger gaps need wire mesh, sheet metal or cement, because rodents gnaw through wood and plastic and widen the hole themselves.
Poison and traps: when do they work?
Many people start with poison from the herbalist or glue traps from the supermarket, and that may catch one or two rodents. The trouble is what happens next. Bait takes several days to work, and in that time the rat may die under a wardrobe or above the ceiling and leave a smell nobody can trace. Bait left loose on the floor can also end up in a child’s hand or a cat’s mouth.
A wooden snap trap works well when it is set correctly: flush against the wall, on the rodent’s route, baited with a piece of the food it is actually eating in your home. With Norway rats, leave the trap baited but unset until the rat has eaten from it a few times, so it gets used to the trap before it catches anything. Bait belongs inside a locked station on the rodent’s route, not in the middle of the kitchen. Our guide on how to get rid of mice and rats in the house covers what you can do yourself before a visit.
When should you call a rodent control company?
If you keep finding fresh droppings after you have cleaned, hear sounds in the ceiling on more than one night, or see gnaw marks on electrical wiring, the rodent has settled in and isn’t just passing through. The same goes for any restaurant or food store, because droppings in food make it unfit to eat, and that can ruin an entire stock. Send us a photo of the signs and where you found them on WhatsApp at +201007892200, and we visit the same day in any governorate.