Take the fat-tailed dwarf lemur.

Like bears, bees and many other animals, the fat-tailed dwarf lemur goes into this state of 'suspended animation' for the winter.

Based on the population densities of other dwarf lemur species, Gardner says he "would 'guesstimate' that the total population may be in the hundreds."

So far we know almost nothing about the new dwarf lemurs.

The dwarf lemurs all belong to one genus, Cheirogaleus.

For the seven months of the dry season, fat-tailed dwarf lemurs hibernate, curled up in tree holes.

They are active at night and they eat fruit, like all dwarf lemurs, but that is about it.

Whether they are a new species or not, the dwarf lemurs of Nosy Hara are in a precarious situation.

Primatologist Charlie Gardner went on holiday and found a new population of dwarf lemurs, which might even be a new species.

Dwarf lemurs are the only primates that hibernate, and this may be what allows the Nosy Hara population to keep going.