(back to the list ) Northern Harrier (Circus cyaneus) [ previously: Marsh Hawk ] NEST LOCATION: ground or shrubs (up to 5 feet) MATING PATTERN: monogamous (or polygynous) BREEDING DIET: small mammals and vertebrates EGGS: 5 unmarked, bluish-white WHO BUILDS NEST: female (with some male help) LENGTH OF INCUBATION: 31 to 32 days HATCH TO FLEDGE TIME: 30 to 35 days NEST TYPE: flimsy platform FORAGING TECHNIQUE: low aerial patrol ALSO EATS: birds, snakes, frogs, insects NUMBER OF BROODS: 1 WHO INCUBATES: female DEVELOPMENT AT HATCHING: semialtricial 1 WHO FEEDS/GUARDS YOUNG: female Notes: Northern Harriers fly low over land contours in search of prey, and, like owls, they have a curved facial ruff of feathers that helps them locate prey by sound.
(WHO FEEDS/GUARDS YOUNG: female Notes: Northern Harriers fly low over land contours in search of prey, and, like owls, they have a curved facial ruff of feathers; helps; them locate prey by sound) Context(WHO FEEDS / GUARDS YOUNG : female Notes : Northern Harriers fly low over land contours in search of prey , and , like owls , they have a curved facial ruff of feathers helps,List([554, 725))):(them; locate; prey) (Northern Harriers; fly; ) (they; have; a curved facial ruff of feathers that helps them locate prey by sound)
WHO FEEDS / GUARDS YOUNG
WHO FEEDS/GUARDS YOUNG: female Notes: Northern Harriers fly low over land contours in search of prey, and, like owls, they have a curved facial ruff of feathers female Notes : Northern Harriers fly low over land contours in search of prey , and , like owls , they have a curved facial ruff of feathers helps,List([554, 725))):(them Northern Harriers they
helps locate fly have
them locate prey by sound
prey
a curved facial ruff of feathers that helps them locate prey by sound