Wildlifeof Thailand
Siberian Weasel
Mustelidae
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Mustela sibirica
Basic stats
Diet
Small mammals, birds, eggs and invertebrates
Litter size
2–12 young, averaging 5
Gestation period
28–30 days
Size
Head and body 25–39cm; tail 13.3–21cm
Weight
360–820g
The Siberian weasel is pale brown above, grading into paler yellowish-brown below; the tail tip may be darker but is not black. Males are larger than females. Across both sexes, head-and-body length is 25–39 cm, tail length 13.3–21 cm and weight 360–820 g (Animal Diversity Web).
It is normally solitary, territorial and active at twilight or night. Small mammals are important prey, but birds, eggs and invertebrates are also eaten, and surplus prey may be cached. Breeding occurs annually; gestation is about 28–30 days and litters contain two to twelve young, averaging five (Animal Diversity Web). It is Nationally Data Deficient (Thailand Red Data 2025).
Quick answers
- What does the Siberian Weasel eat?
- Small mammals, birds, eggs and invertebrates
- What is the litter size of the Siberian Weasel?
- 2–12 young, averaging 5
- How long is the gestation period of the Siberian Weasel?
- 28–30 days
- How big is the Siberian Weasel?
- Head and body 25–39cm; tail 13.3–21cm
- How much does the Siberian Weasel weigh?
- 360–820g