Rodents
(Click pictures for larger view)
House Mouse
House mice are extremely prolific breeders, at 35 days of age they mature and carry for 18 to 21 days. Under good conditions a female can have a litter approximately once every 50 days. In 6 months one pair of mice can eat about 4 pounds of food and produce 18,000 fecal droppings.
Norway and Roof Rat
The Brown or Norway rat may reach sexual maturity in two months. The average litter size is 7 to 8, with 3 to 12 litters in a single year. The Black or Roof rat becomes sexually mature in 4 months and continues to grow until it is 18 months old.
