Based on their environment and related species, we can assume the Tarpan's diet consisted of:
* Grasses: These would have been their primary food source, as they lived in open grasslands and steppes.
* Forbs: These are broad-leaved, non-grassy herbs that would have provided additional nutrients and variety.
* Twigs and bark: In winter, when grasses were scarce, they likely supplemented their diet with twigs and bark, similar to other wild horse breeds.
* Seasonal fruits and berries: When available, they would have likely consumed seasonal fruits and berries.
It's important to note:
* While the Tarpan is extinct in the wild, there are attempts to reintroduce it through breeding programs using horses closely related to the Tarpan.
* These modern-day Tarpan breeds are likely to have a similar diet to their extinct ancestors.
Ultimately, the Tarpan horse's diet would have varied based on the time of year and the availability of food in their specific environment.