House Mouse:
General Description
- Distribution: Worldwide distribution.
- General Appearance: Small, slender
- Adult size: small
- Body weight: 12-30 g
- Length (nose to the tip of tail) – 6-9 cm
- Length of Tail: 7-10 cm
- Snout: Pointed
- Ears: large, some hair
- Eyes: small
- Tail: uniformly dark
- Fur: light brown, light gray, smooth
- Droppings: rod-shaped, 3-6 mm
Life Cycle and Common Characteristics
- It is characterized by rapidly multiplying, with an annual reproduction rate of about 44 per female rat.
- The maturity period of the female sperm is about 42 days, and the gestation period is 19–21 days.
- The female lays eggs between 4 and 8 times during her life, depending on the nature of the food.
- Up to 5-6 children per pregnancy (and up to 12-20 children in rare cases).
Comparisons of the reproduction characteristics among the three commensal rodents.
| House Mouse | Roof Rat | Norway Rat | Characteristic |
| 42 Day | 68 Day | 75 Day | Days to Maturity |
| 19-21 Day | 20-22 Day | 22-24 Day | Gestation Period |
| 5.8 | 6.2 | 8.8 | Young per Litter |
| 7.67 | 5.42 | 4.32 | Litters per year |
| 44.6 | 33.6 | 38.00 | Young / female / year |
| 1>5-2 Month | 2-3 month | 2-3 month | Age at Mating |
| Year-Long | Spring & Fall | Spring & Fall | Breeding Season |
Comparisons of the characteristic of growth and development of commensal rodents.
| House Mouse | Roof Rat | Norway Rat | Charcater |
| 19-21 day | 20-22 day | 22-24 day | Gestation Period |
| 0.8-1.5 g | 4-5 g | 5-6.5 g | Weight at Birth |
| Without pink hair | Without pink hair | Without pink hair | Hair Color at Birth |
| 3-4 day | 6 day | 3-4 day | Opening the Ear |
| 11-14 day | 14-15 day | 16 day | Opening of the Eye |
| 9-10 day | 10 day | 10 day | Appearance of Lower Incisors |
| 7-8 يوم
7-8 day |
11 day | 11 day | Appearance of Upper Incisors |
| 42 day | 68 day | 75 day | Day to Maturity of Females |
| 1 Year | 1 Year | 1 Year | Length of Life |
