ferruginous hawk Directory References Discover Timeline of the American Civil Rights Movement 7 of the World’s Most Dangerous Festivals Cruel and Unusual Punishments: 15 Types of Torture Where Is “Old Zealand”? Which Religion Is the Oldest? 10 of the World’s Most Dangerous Fish 7 of the World’s Deadliest Shipwrecks Contents ferruginous hawk bird Ask the Chatbot a Question Ask the Chatbot a Question Also known as: Buteo regalis Learn about this topic in these articles:size In hawk…notable rough-legged hawks are the ferruginous hawk (B. regalis)—the largest North American buzzard (up to 63 cm [25 inches] long)—and the rough-legged hawk (B. lagopus) of both the Old and New Worlds.Read More