What aspect of fennecs aids their survival during the day?

The oversized ears of fennecs play a significant role in their survival during the day. These large ears serve a dual purpose: they not only help in regulating the fennec's body temperature by dissipating heat but also enhance their hearing ability. This allows them to be more aware of their surroundings, including the sounds of potential predators or prey. The ears have a vast blood vessel network that aids in cooling, which is crucial for an animal that inhabits hot desert environments. This adaptation is essential for fennecs to remain active and successful during the daylight hours when temperatures soar.