The Australasian warblers are native to Australia, Indonesia, New Zealand and the south-west Pacific.
Hybridization has been documented in two genera, Calamanthus and Sericornis. In the latter genus, hybridization between White-browed Scrubwren (S. frontalis) and Atherton Scrubwren (S. keri) was confirmed by mtDNA analysis (Joseph & Moritz 1993).
Joseph, L. & Moritz, C. (1993). Hybridization between the White-Browed and Atherton Scrubwrens – Detection with Mitochondrial-DNA. Emu 93, 93-99.