Rarer still is barred owl predation on turtles. The spotted owl has been hypothesized to be within a superspecies with the barred owl. The barred owl is a large species. The pellet of the barred owl averages about in diameter and in length. A distraction display was recorded by a female barred owl when humans approached. The barred owl is a naturally long-living bird. The barred owl has a well-developed eye anatomy. The barred owl like most owls is largely adapted to nocturnality. A barred owl was killed after being directly sprayed with heptachlor. Generally, breeding bird surveys and CBCs show that the barred owl is stable or increasing. Northern goshawks ("Accipiter gentilis") have reportedly killed both young and adult barred owl. The barred owl is one of the most common owls in North America. Like the tawny owl, the barred owl usually hunts from a perch. The barred owl was the most commonly admitted raptorial bird in a Florida study. A wandering barred owl was once seen flying over Lake Michigan from the nearest land.