The Blue Moorhens are distinguished at once by Coloration and by the thick, compressed, rather short and high bill, small rounded nostril not placed in a groove, and broad frontal shield covering all the anterior portion of the crown and squarely truncated behind. The wing is rounded, the first quill about equal to the 6th or 7th; 2nd, 3rd, and 4th subequal. Tarsus and toes very long. Sexes alike.
About 13 species are known from Africa, Madagascar, the Mediteranean region, Southern Asia, the Malay Archipelago, Australia, New Zealand, and the Pacific islands. One species is Indian.