 In 1898 , the British naturalist Henry Ogg Forbes described a second species of Necropsar , N. leguati , based on a skin in the World Museum Liverpool , specimen <unk> , which was labelled as coming from Madagascar . He suggested that this was actually the bird mentioned by Tafforet , instead of N. rodericanus from mainland Rodrigues . Walter Rothschild , however , believed the Liverpool specimen to be an albinistic specimen of a Necropsar species supposedly from Mauritius . In 1953 , Japanese writer Masauji Hachisuka suggested that N. leguati was distinct enough to warrant its own genus , <unk> . In a 2005 DNA analysis , the specimen was eventually identified as an albinistic specimen of the grey trembler ( <unk> gutturalis ) from Martinique . 
