It's important to note:
* Survival rates: Sadly, only about 50% of cubs survive their first year. This is due to factors like food scarcity, disease, and habitat loss.
* Individual variation: The number of offspring can vary slightly depending on the individual tigress's age, health, and environmental conditions.
So, while a Sumatran tigress *can* produce a litter of two to three cubs per year, the actual number of surviving offspring is often lower due to the challenges they face.