With a population that may number fewer than 1,000, silky sifakas are one of the rarest and most critically endangered mammals on the planet. A typical day for silky sifakas consists of foraging trips for leaves and fruit, broken up by plenty of rest in the rainforest canopies of northeast Madagascar. In fact almost half the day is spent taking it easy. Living in small, female-led groups of up to 10 individuals, these large lemurs, famed for their long, silky, white fur, travel around 700 metres each day through a territory that covers many tens of hectares.

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