A bulky silhouette on a rocky coast looks almost idle. That motionless shape is a Steller’s sea eagle, a raptor that can match the mass of a small black bear cub and still make a living by “standing at the waterline” waiting for fish to come into range.The strategy is not laziness but extreme optimization of basic metabolic rate and risk. Perched a few meters above the surf, the eagle uses binocul...More