 Falco peregrinus pealei, described by Ridgway in 1873, is also known as Peale's falcon, and includes rudolfi. It is found in the Pacific Northwest of North America, northwards from the Puget Sound along the British Columbia coast (including the Queen Charlotte Islands), along the Gulf of Alaska and the Aleutian Islands to the far eastern Bering Sea coast of Russia, and may also occur on the Kuril Islands and the coasts of Kamchatka. It is non-migratory. It is the largest subspecies, and it looks like an oversized and darker tundrius or like a strongly barred and large anatum. The bill is very wide. Juveniles occasionally have pale crowns. Males weigh 700 to 1,000 g (1.5 – 2.2 lb), while females weigh 1,000 to 1,500 g (2.2 – 3.3 lb).
