The Monkey eating eagle, scientifically known as Pithecophaga jefferyi, has got its name for its preference for eating monkeys, particularly macaques. It is otherwise known as the Philippine eagle. Belonging to the family Accipitridae (subfamily Circaetinae), this eagle is native to forests of Philippine. 1894 was the year when this eagle was first described to be there. This species can also be sighted in four major islands: eastern Luzon, Samar, Leyte and Mindanao (accounts for biggest number of eagles). This eagle can fly up to an elevation of 1800 meters and covers a huge area, ranging about 150,000 square kilometers.
The Philippine Eagle’s plumage is quite attracting and it gives her an appearance having a lion’s mane, like the mythical griffin. This dark faced Eagle has a creamy-brown nape and crown. The back is dark brown in color, with whitish underside and under wings. The legs are very heavy with yellow coloration; accompanied by large and powerful claws. The beak appear to be bluish-gray in color, so also the eyes. The average length of this Eagle is reported to be 86–102 cm, with an average of 95 cm for males and 105 cm for females. The longest of all reported till date is of 112 cm length. Like other Eagles the females are larger than the males. The weight of an adult eagle ranges between 4.7 to 8 kg; the males average around 4.5 kg and the females 6 kg. The typical Eagle wingspan is of 180-200 cm.
Historically these Eagles are being hunted because of their predatory nature. As the count of this Eagle is decreasing day by day and today only between 200 and 400 of them survive, IUCN declared this species to be critically endangered in 2010. The PEF of Davao City, located in Mindanao is a dedicated organization for the protection and conservation of the Monkey eating Eagle and its habitat.