How they enter buildings is a different matter. The roof rat, on the other hand, enters buildings from elevated points such as overhanging tree limbs or utility lines. Nesting sites for this rat tend to be located in trees or dense vine growth. Rats are not the least bit curious. In fact, they are highly suspicious of changes that occur within their territories, such as the addition of bait stations.
Rats eat much more food at a single feeding than a mouse.
These animals have slightly larger territories than do mice. Once established, their territories may cover an area of approximately a 50-foot radius relative to the nest. An area is baited with the hope the rat or mouse will stumble into the bait, eat it, and eventually die. Fecal material is deposited daily by both rats and mice. A mouse may produce 50 to 100 droppings daily, while a rat will produce about 50 per day.