Silky sifaka
It is a seasonal breeder and only mates one day a year during the start of the rainy season.  As with other sifaka species, non-maternal infant care is common.  Group members of all ages and both sexes will often groom, play, occasionally carry, and even nurse infants that are not their own.  The silky sifaka vocalizes frequently, and relies strongly on scent for communication.