Striated Thornbills breed in small related groups, defending a particular nesting territory. Both members of a pair of Striated Thornbills help to build the oval, domed nest, with a hooded entrance near the top, out of bark mixed with lichen, mosses and spider webs and egg sacs (the nest is commonly covered with white material), lining it with feathers, fur or soft plant down. The nest is usually in the outer branches of trees, shrubs and vine-covered saplings, mainly of eucalypts. The female incubates the eggs and both parents feed the young, along with other members of the breeding group. Nests may be parasitised by Horsfield's and Shining Bronze-cuckoos, as well as Fan-tailed Cuckoos.