This family of antibacterial peptides are secreted from the granular dorsal glands of Litoria aurea (Green and golden bell frog), Litoria raniformis (Southern bell frog), Litoria citropa (Australian blue mountains tree frog) and frogs from genus Uperoleia.
The Dusky Toadlet (Uperoleia fusca) is a species of Australian ground-dwelling frog that inhabits coastal areas from just north of Sydney, New South Wales to mid-northern Queensland.
It has a solid distribution south of Jervis Bay Territory and there are some populations between Jervis Bay and Sydney, there are records for this species north of Sydney, however similarities with other Uperoleia frogs may have led to mis-identification.