del Hoyo, J. & Collar, N. (2017). Sumba Flowerpecker (
Dicaeum wilhelminae). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from
http://www.hbw.com/node/1344079 on 14 July 2017).
Hitherto treated as conspecific with D. sanguinolentum and D. hanieli, but differs from latter in characters given under that species (below). Differs from former (above) in its all-red vs orange-buff throat in male (3); stronger black ventral stripe (1); pale grey vs buff-tan belly in male and entire underparts in female (2); shorter (effect size −1.8), deeper (effect size 3.7) bill (1+2=3); apparently very different voice, but samples too small to be sure that recorded calls are homologous#R. Monotypic.