Yes Sifakas are endangered
Maybe some crocodiles.
Silky sifakas haven't been studied well enough to know their average lifespan, but typically sifakas can live between 13 and 17 years in the wild.
Fruit, Berries, Bark, Flowers, Leaves and Buds
Crowned sifakas are generally not considered harmful to humans. They are primarily herbivorous and tend to avoid direct confrontation with people. While they can exhibit defensive behaviors if threatened, such as vocalizing or displaying, they do not pose a significant danger to humans. Most interactions between crowned sifakas and people are peaceful, often occurring in their natural habitats in Madagascar.
Verreaux's sifakas primarily eat a diet consisting of leaves, flowers, fruits, seeds, and bark. Their diet is mainly composed of a variety of plant species found in their native habitat in Madagascar.
Some species of lemur live in rainforests, such as the ruffed lemurs (found in some zoos), the indri, and the larger sifakas (known as simponas). Other lemurs, such as the ring-tailed lemur and the smaller sifakas tend to live in dry scrub, deciduous forest, or other habitat types.
Silky sifakas mainly eat leaves, flowers, fruits, seeds, and occasionally insects. They have a specialized diet that consists mainly of young leaves and fruits from certain tree species found in their natural habitat in Madagascar.
I don't see an average lifespan reported in the common lemur books, but if it's anything like its close relatives, the sifakas, they probably live about 15-20 years in the wild. Otherwise, the Indri has not been successfully kept in captivity.
In general, lemurs share the same diet as most other primates: fruits, leaves, and insects. Some species, such as sifakas eat more leaves, while others, like ruffed lemurs, eat more fruit. Smaller, nocturnal lemurs tend to eat a lot of fruit and insects.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -IFA---. That is, seven letter words with 2nd letter I and 3rd letter F and 4th letter A. In alphabetical order, they are: bifaces sifakas
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern -I--KA-. That is, seven letter words with 2nd letter I and 5th letter K and 6th letter A. In alphabetical order, they are: didakai kishkas sifakas