[1][2] The species primarily consumes plants of the genus Ziziphus as well as Acacias.

S. siva is a medium-sized moth with a wingspan of about 4–8 cm (1.6–3.1 in).

The wings are either ash with mottled brown (in the case of males) and a chestnut brown with subtle white markings in the case of the females.

S. siva is sexually dimorphic, so it is not difficult to distinguish male individuals and females.

Like other members of the family, the mouthparts are lost in the pupal stage and the adults do not feed.