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The northern harrier (Circus hudsonius), also known as the marsh hawk or ring-tailed hawk, is a bird of prey. It breeds throughout the northern parts of the northern hemisphere in Canada and the northernmost USA .
The type species was subsequently designated as the western marsh harrier. [ 3 ] [ 4 ] Most harriers are placed in this genus. The word Circus comes from the Ancient Greek κρέξ ( kréx) referring to a long legged bird, and is possibly ultimately derived from an onomatopoeia. [ 5 ]
Western marsh harrier. The western marsh harrier (Circus aeruginosus), often simply called the marsh harrier, breeds widely across Europe and Asia. It is migratory except in the mildest regions, and winters mainly in Africa. It hunts small mammals, frogs, fish, insects and birds, surprising them as it drifts low over fields and reedbeds. Its ...
Western marsh harrier males often pair with two and occasionally three females. Pair bonds usually last for a single breeding season, but some pairs remain together for several years. The ground nest is made of sticks, reeds and grasses. It is usually built in a reedbed, but the species will also nest in arable fields.
The nest is built on the ground or on a mound of dirt or vegetation. Nests are made of sticks and are lined inside with grass and leaves. Four to eight (exceptionally 2 to 10) whitish eggs are laid. The eggs measure approximately 47 mm × 36 mm (1.9 in × 1.4 in). The eggs are incubated mostly by the female for 31 to 32 days.
The swamp harrier (Circus approximans), also known as the Australasian marsh harrier or Australasian harrier, is a large, slim bird of prey widely distributed across Australasia. In New Zealand , it is also known by the Māori name kāhu .
The changeable hawk-eagle (Nisaetus cirrhatus) or crested hawk-eagle is a large bird of prey species of the family Accipitridae. More informal or antiquated English common names include the marsh hawk-eagle or Indian crested hawk-eagle . [ 3 ]
The well-covered nest is lined with hair from the adult rabbits. ... Birds of prey such as the great horned owl and northern harrier or marsh hawk are the major ...