 However, the greatest predatory impact (perhaps alongside domestic cats) is probably from raptorial birds.They may be taken by nearly every variety of North American accipitrid, from the smallest, the sharp-shinned hawk, to one of the two largest, the golden eagle, most every North American falcon from the smallest, the American kestrel, to the largest, the gyrfalcon, and almost all owl species from northern pygmy owls to snowy owls.Overall, 28 raptorial bird species are known to hunt robins.