What is the biggest species of hawk?

Opinions vary on what birds should be considered Raptors (Birds of Prey) and which birds shouldn't. Many people consider vultures to be Raptors because they are carnivores and although they are scavengers most of the time, when they do catch live prey, they catch the prey with their talons. Others argue that true Raptors are predatory (meaning they primarily hunt their food) and since vultures are primarily scavengers, they should not be included as Raptors. Unfortunately, ornithologists (scientists who study birds) have not come to a consensus on this point.

So, if you count condors and other vultures as Raptors:

In terms of weight, length, etc., the Andean Condor is the heaviest and has the broadest wingspan while the California Condor is the longest.

If you don't count condors and other vultures as Raptors:

The largest Birds of Prey are eagles in all aspects. They are true predators, although they will readily feast on a fresh carcass. The Stellar's Eagle is the heaviest, the Phillipine eagle is the largest in terms of physical dimension, and Harpy's are the bulkiest.