Philippine Hawk-Eagle

The Philippine hawk-eagle is a large raptor with a dark brown upper plumage and a pale brown belly. Head and chest are streaked and the lower belly is finely barred. The species has a conspicuous backwards crest. Juveniles are paler. The call a high, screeching "week wik!" or single "week!". It was formerly conspecific with the Pinsker's hawk-eagle but has a shorter crest, larger size, browner plummage and plain markings on the belly. This split was supported by molecular analysis. In terms of size, it is a smaller eagle with a length of 56 to 67 cm, and a wingspan of 105 to 125 cm. One female weighed 1.16 kg. This species is monotypic and has no subspecies.

The first comprehensive study was conducted of a nesting pair in Rizal in 2020. This nest was livestreamed daily on Facebook. This breeding pair nested in a Bombax ceiba tree in secondary forest with a territory spanning 3.3 square kilometers. Not much information of its diet in the wild but believed to feed mostly on birds and small mammals. The nest in 2020 revealed the diet to consist of 35% birds, 32% mammals, 6% reptiles and the remaining 27% to be unknown. It perches high up in the cannopy but is mostly seen at forest edge or soaring over the forest. Incubation took approximately 3 weeks, in the first to third week the body size doubled every week. In the 4th to 7th week, the development of the feathers and juvenile plummage was observed. Fledging took approximately two months.