Fungi in the Nidulariaceae, otherwise known as ‘bird's nest fungi’, are among least studied groups of Agaricomycetes (Basidiomycota). Bird's fungi globally distributed and typically grow on woody debris or animal dung saprotrophs. This group is morphologically diverse with ca. 200 described species. Phylogenetic relationships bird's were investigated four commonly used loci (ITS, LSU, tef, rpb2...