Eurasian Eagle-Owl Photo: Brad Wilson. No bird is safe from the Eurasian Eagle-Owl—not even its kin. The mighty strigiform goes after Tawny and Snowy owls, as well as such larger birds as Gray Herons. On China’s alpine meadows, the eagle-owl and the Upland Buzzard hunt the same voles and beady-eyed pikas. The buzzards conduct their business by day; the owls take over after dusk. With its 6.5-foot wingspan, it’s also been known to hunt foxes and fawns.