The Philippine Postal Corporation will issue a set of stamps and a souvenir sheet featuring rats and mice found in Luzon Island.

Rats are various medium sized rodents and have an average life span of 2 to 3 years. Domestic rats differ from wild rats in many ways. They are calmer and less likely to bite. They can tolerate greater crowding. They breed earlier and produce more offsprings.

1. Luzon furry-tailed rat (Batomys granti) This rat is from the cloud rat group. It feeds on fruits and leaves but unlike its closest relatives it lives mostly on the ground.

2. Cordillera striped earth-rat (Chrotomys whiteheadi) There are striped earth-rats that occur in the mountains over most of Luzon Island, and on Mindoro and Sibuyan. This species lives in the Central Cordillera of Luzon. Like its relatives, this species feeds primarily on earthworms, which it finds by burrowing through the soil and thick layers of humus high in the mountains. This species is useful in controlling the alien earthworms that are damaging the famous rice terraces of Ifugao.