Complex sentence: It shares the genus "Surniculus" with the Philippine Drongo-cuckoo "Surniculus velutinus" which is sometimes treated as a subspecies of "S. lugubris", but can be separated as a species on the basis of vocalization and juvenile plumage.
Split into simpler sentences: It shares the genus "Surniculus" with the Philippine Drongo-cuckoo "Surniculus velutinus". This is sometimes treated as a subspecies of "S. lugubris", but can be separated as a species on the basis of vocalization and juvenile plumage.