Philippine Eagle aka Monkey-eating Eagle (Pithecophaga jefferyi), family Accipitridae, order Accipitriformes, endemic to the forests of the Philppines

CRITICALLY ENDANGERED.

While not the largest eagle in terms of weight, they are considered the largest eagle in the world in terms of length and wing surface area.
They are endangered due to loss of habitat (deforestation).
Once considered to be closely related to the Harpy Eagle, DNA analysis concludes that they are actually much more closely related to the Snake Eagles (like the Bataleur).
Despite the nickname, they feed on a wide variety of mid sized animals, like monitor lizards, flying lemurs, small deer, etc, as well as monkeys.

photographs: Shemlongakit, HCruz985, Rich Lindie