 However, a different molecular phylogenetic study by Wink and Sauer-Gürth (2004) found that the black-chested and short-toed snake eagles form a clade together with the bateleur ("Terathopius ecaudatus").The black-chested snake eagle is thus commonly considered to form a superspecies with the short-toed and Beaudouin's snake eagles.The main identifying character of this bird is its dark brown-black head and chest, to which it owes its name.