What advantage does the kangaroo rat's external cheek pouch system provide during foraging trips?

Answer

It minimizes water loss by preventing salivation while transporting seeds

The fur-lined cheek pouches are designed for external transport. This behavior is clever because keeping the mouth closed minimizes water loss that would otherwise occur from moistening the seeds with saliva during transport.

What advantage does the kangaroo rat's external cheek pouch system provide during foraging trips?
dietanimalherbivoreratomnivore