29. Lemurs
Lemurs display remarkable flexibility in their sleep habits. Some species can enter a hibernation-like state known as torpor, allowing them to sleep for weeks at a time when food is scarce. Others find safety by napping in tree hollows, protected from predators and harsh weather.
These unique strategies help lemurs survive the unpredictable conditions of Madagascar’s forests, making their sleep patterns among the most intriguing in the primate world. BBC