Grey Penduline-Tit (Anthoscopus caroli) and Buff-bellied Penduline-Tit (Anthoscopus sylviella) (Sibley and Monroe 1990, 1993) have been lumped into Anthoscopus caroli following Dowsett and Forbes-Watson (1993).
Considered by some authors as a subspecies of Grey Penduline-Tit (Anthoscopus caroli).
Considered by some authors to be a subspecies of Grey Penduline-Tit (Anthoscopus caroli).