Four eagle species vie to be the world’s most fearsome bird of prey:
the Steller’s sea eagle (Haliaeetus pelagicus) of north-eastern Asia;
the Philippine eagle (Pithecophaga jefferyi) of South-East Asia;
the martial eagle (Polemaetus bellicosus) of Africa and
the harpy eagle (Harpia harpyja), which ranges from Mexico in southern North America to Argentina in South America.

Female harpy eagles are up to 40% larger than males, and can weigh up to 9kg and possess talons measuring up to 13cm long. Usually they hunt and kill monkeys, which can weigh as much as the eagle itself. The birds will also take sloths, young brocket deer and collared peccaries, a type of jungle pig.

Adult harpy eagles do not actively hunt monkeys close to the nest tree. Instead, they purposely leave them, providing the young chick with a bountiful hunting ground close to home, where it can practise its hunting skills until it is ready to move on.

More info can be found in BBC website

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