Peak Migration: Mid Oct – Early Nov
Record Daily High: 322 on Oct 25, 2017
Record Seasonal High: 1123 in 2017
Peak Migration: Late March – late Apr, and Mid Oct – Early Nov
Origin of name: The feathers on its legs and feet give the limbs a “rough” appearance.
Other names: Black hawk, mouse hawk, squalling hawk.
Hunting habits: Preys on mice, lemmings, pocket gophers, cutworms and caterpillars, and small to game-sized birds. Usually takes prey on the ground.
Nesting habits: Nests on open tundra and mountainsides. When lemmings are abundant, lays 5-7 eggs, other years only 2-3 eggs. Female does most of the incubating, which takes a month. The young leave the nest about 41 days after hatching.
Length: 46-59 cm
Wingspan: 122-143 cm
Weight: Ranges from 745 to 1380 grams; females are generally larger than males. In the world of raptors, females are bigger, stronger, and usually more aggressive than males.
Life expectancy: One banded bird was shot when 6 years, 9 months old. Another lived 17 years, 9 months.
Image Credits: Michael Furtman