Known as the "Tiger of the Skies", Haast's Eagles are one of the only birds to ever be the apex predator of an ecosystem, a distinction they hold mostly because there are no predatory mammals on New Zealand, but also because what the fuck is going to step to a pissed-as-hell mega-raptor so ungodly gigantulous that it's wings blacken the sky and its insanity-causing shrieks presumably caused deafness and incontinence in anything unlucky enough to hear it. Gigantic, feather-covered instruments of God's Unadulterated Fury, Haast's Eagles stood six feet tall, weighed a little over 35 pounds, and had a wingspan of roughly ten feet. These goddamned things were, no exaggeration, the size of hang gliders, tore ass through the densest jungles of New Zealand with the dexterity of a howler monkey, and boasted black, pointy, fuck-off claws that were about the same size as a modern-day Bengal tiger's.
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Moa [an extinct species of flightless nine feet tall ostrich-like birds] were about 15 times the Haast's Eagle's mass, yet this thing could dive-bomb them with enough force to crush their skulls and/or pelvises and/or dicks, and once those poor dumb bastards were immobilized, crippled, and/or de-balled the Haast's Eagle's 1,000 psi of talon crushing might was powerful enough to snap their bones in half.