Grey-headed Imperial Pigeon (Ducula radiata) [XC414763]
by id from Sulawesi: Tangkoko lowlands, Indonesia (song)
Grey-headed Imperial Pigeon (Ducula radiata) [XC610575]
by Marc Anderson from Sulawesi: Tangkoko lowlands, Indonesia (song)
Subspecies
Forms superspecies with Mindoro Imperial-Pigeon (Ducula mindorensis), with which sometimes considered conspecific. Also closely related to Pink-bellied Imperial-Pigeon (Ducula poliocephala) and White-bellied Imperial-Pigeon (Ducula forsteni). This species-group may form a link between Ptilinopus fruit-doves and other imperial-pigeons.