Orthotomus or tailorbirds, is a genus of small passerines often placed in the Old World warbler family Sylviidae. However, recent research suggests they more likely belong in the Cisticolidae and they are treated as such in Del Hoyo et al. (2006). These are rare species. One species, the mountain tailorbird (and therefore also its sister species rufous-headed tailorbird), is actually closer to an old world warbler genus Cettia. They occur in the Old World tropics, principally in Asia.