a1. Chin, throat, and upper part of chest gray or black.b1. Band on fore breast light slate-gray. carola (p. 46)b2. Band on fore breast black. nigrorum (p. 47) a2. Chin, throat, and upper part of chest nearly pure white. mindanensis (p. 47)
a1. Chin, throat, and upper part of chest gray or black.b1. Band on fore breast light slate-gray. carola (p. 46)b2. Band on fore breast black. nigrorum (p. 47)
a2. Chin, throat, and upper part of chest nearly pure white. mindanensis (p. 47)
