It is endemic to forests of the West Usambara Mountains of Tanzania[3] where it is threatened by habitat loss.

The skin is densely warted and the colour is a mottling of various shades of brown and black.

[4][5] It is found climbing in trees and on the ground in damp forests with thick undergrowth.

[4] Callulina kisiwamsitu is a predator and feeds on small invertebrates including bugs, grasshoppers and millipedes.

The male Callulina kisiwamsitu calls from low vegetation to attract a mate.