 The invisible rail , first classified by English zoologist George Robert Gray in 1860 , is the only member of the monotypic genus Habroptila . The genus name Habroptila derives from the Greek habros , " delicate , pretty , splendid " and ptilon , " feather , wing " ; wallacii commemorates British zoologist Alfred Russel Wallace . Local names include " soisa " , " tibiales " and " rèie " . 
