Rocs

At first sight, a roc's silhouette looks much like any other bird of prey. As it descends, however, its gargantuan size becomes terrifyingly clear. 
With wingspans of over 200 feet and talons the size of boats, rocs have been known to hunt creatures as large as full-grown whales, hurtling down to the ocean at ear-shattering speeds, darkening the sky with the shade of their wings, and scooping their huge prey out the water like an eagle does a trout.
Category:Monstrosities