(Macwhirter and Bildstein, 1996) Loose colonies may form, and males may mate with up to five females in a season, although monogamy is more common. FREQUENCY: Rare. Calls of distress are urgent and high pitched, also in rapid succession. Although both turkey vultures and rough-legged hawks share the habit of flying with wings in a V-shape, neither flies low over the ground like the northern harrier. Listen to Bald eagle on bird-sounds.net - a comprehensive collection of North American bird songs and bird calls. In Washington, these displays can be seen as early as late February. (Burton and Burton, 1989; Chinery, 1992; Eastman, 1999; Ryser, 1985) North America is home to only one type of harrier, the Northern Harrier. Medium-sized hawk with long tail and thin wings. Breeding in Middle America, North America: Widespread; can be seen in 46 countries. This call is more nasal-sounding in males than in females. They are a sexually dimorphic species in respect to both size and color. Long wings are gray above and white below with black tips. They are protected on the US Migratory Bird list. Average harrier length is 17-23 inches (43-58 cm) and the wingspan averages 38-48 inches (96.5-122 cm). Across North America, from the Arctic Tundra to the grasslands south of the border, if you look in the right places, you’ll find peculiar creatures haunting the landscape. The sexes also differ in weight, with males weighing 290 to 400 g (10 to 14 oz), with an average of 350 g (12 oz), and females weighing 390 to 750 g (14 to 26 oz), with an average of 530 g (19 oz). Sounds of courtship are reflected by rapid kek, quik, or ek notes in series. NOTES: North America is home to only one type of harrier, the Northern Harrier. Its facial features resemble those of owls more than hawks. The hen harrier (Circus cyaneus) is a bird of prey.The genus name Circus is derived from Ancient Greek kirkos, meaning 'circle', referring to a bird of prey named for its circling flight.The specific cyaneus is Latin, meaning "dark-blue".. Females and immatures are warm brown. Northern harriers are slim bodied, long-legged and long-tailed hawks. Northern harriers are especially vocal around the nest. Northern Harrier (Circus hudsonius) bird calls and sounds on dibird.com. Calls include high whistles and barks. While many taxonomic authorities split the northern harrier and the hen harrier into distinct species, others consider them conspecific. Females are heavier and larger than males. The male Northern Harrier attracts a female with a roller-coaster display flight, often performing 25 rises and falls. Northern Harrier: The Gray Ghost. It has a dark hooked bill with a yellow base, yellow eyes, legs and feet. Similar species: The various buteo hawks are larger, chunkier, with wider, more rounded wings and shorter tails. The northern harrier is 41–52 cm (16–20 in) long with a 97–122 cm (38–48 in) wingspan. When he is near the nest he will call out, and when the female comes to him he will drop food to her. Females are brown above with varying degrees of brown and buff streaking below. Distinctive foraging behavior and conspicuous white patch on rump in all plumages. During breeding season, northern harriers become very territorial and will attack anyone who threatens their nesting areas. Their call consists of various “kek” notes. It resembles other harriers in having distinct male and female plumages. First they'll come into view over a distant marsh … Feeds mainly on small mammals. Flies with wings held in a V-shape, low over open fields and marshes, listening for rodents lurking below. Northern Harrier: This large hawk has gray upperparts, white rump, and white underparts with spotted breast. Adult males gray above and whitish below with black wingtips.
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