Orthotomus longicaudus; Print; Tailorbirds are small birds; most belonging to the genus Orthotomus. While they were often placed in the Old World warbler family Sylviidae; recent research suggests they more likely belong in the Cisticolidae and they are treated as such in Del Hoyo et al. One species; the mountain tailorbird (and therefore also its sister species rufous-headed tailorbird); is actually closer to an old world warbler genus Cettia.; nest