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Scientific name
Papilio (Achilides) chikae Igarashi, 1965
Chinese name
呂宋翠鳳蝶、呂宋烏鴉鳳蝶、孔雀鳳蝶
English name
Luzon Peacock Swallowtail
Classification
鳳蝶科(Papilioniidae)，鳳蝶亞科(Papilioniinae)，鳳蝶族(Papilionini)
Diagnosis
Medium-sized swallowtail butterfly. Wingspan about 10 cm, without significant difference between both sexes. Forewing somewhat triangular with termen slightly incised; hindwing broad, with termen undulate and a tail arising from M3 vein. Forewing ground colour black, all cells tinged metallic green and forming transverse pattern; underside similar to upperside but with transverse patterns white or whitish gray; upperside of hindwing in male having four significant lunate red pattern by connecting a metallic bluish green patch from apex of hindwing. Female similar to male in size and wing pattern but with more developed lunate patterns on hindwing and apical patch on hindwing blue. Distinguishable from a sibling species Papilio hermeli Nuyda, 1992 (Figs. 29-30) by having less developed lunate pattern on hindwing.
Distribution
Endemic to mountainous areas of the Baguio and Bontoc regions of Luzon of the Philippines.
Habitat and Ecology
The known hostplants of this species are Zanthoxyllum and Euodia of Rutaceae. For more detail of biological information see Igarashi & Fukuda (2000).
Threats and Conservation Status
This species has facing serious stress from collecting and trading. Although captive breeding could be easy and helpful in releasing part of the threats, the processes and management of captive breeding in the Philippines have not yet been regulated by laws or practical policies, though some of the breeders have announced that their specimens are bred legally.
Remarks. Papilio hermeli has been regarded as a subspecies of P. chikae by several researchers though this proposal has not been formally published.
Remarks
Papilio hermeli has been regarded as a subspecies of P. chikae by several researchers though this proposal has not been formally published.

Papilio (Achillides) chikae Igarashi, male,
upperside, Luzon

Papilio (Achillides) chikae Igarashi, female,
upperside, Luzon

Papilio (Achillides) hermeli Nuyda, male,
upperside, Mindoro

Papilio (Achillides) hermeli Nuyda, female,
upperside, Mindoro