Rats and Mice
Rats and mice are generally regarded as very adaptable, omnivorous scavengers. They are very agile animals and mostly nocturnal. They may range and feed during the day if the population is very large, food is short, or there is little disturbance or danger. In their movements to and from the nest site, they are very sensitive to, and wary of any changes in their travels, they tend to move and feed under or over cover, seldom running about in the open spaces. This behavior displays a marked reliance on the sense of touch and is much exploited in the placement of baits and traps.
Mice, on the other hand, although seeming to maintain a high degree of caution in their movement, are very curious and adventurous animals. Mice often investigate new food sources within a very short time after their appearance, and they seem to prefer nibbling at small amounts of food at numerous different locations. This preference for feeding at several sites is to be taken into account in mouse-baiting programs.