The Swamp Harrier ,
Circus approximans, also known as the Marsh Harrier, Australasian
Harrier, Kāhu, Swamp-hawk or New Zealand Hawk is a large, slim bird of
prey in the family Accipitridae.
The Swamp Harrier is largely dark brown, becoming lighter with age, and
has a distinct white rump. It hunts by flying slowly, low to the ground,
on upswept wings. The body length is 50 to 60 cm (20-24 in), and the
wingspan is 120 to 145 cm. The recorded weights of adults range from 580
to 1100 g, and females are significantly larger than the males.
Distribution and habitat
The Swamp Harrier is widespread through Australasia and many islands
in the south-west Pacific region, including much of Australia (except
the arid region), New Zealand, Fiji, Vanuatu and New Caledonia. It is
usually found in wetlands and well-watered open country.
Diet
The Swamp Harrier mainly feeds on ground birds and waterbirds,
rabbits and other small mammals, reptiles, frogs and fish. It also known
to feed on carrion where available, including roadkill.
Breeding
This species nests on the ground, often in swamps, on a mound in
reeds or other dense vegetation. The clutch size may range from 2 to 7,
but is usually 3 or 4. The incubation period is about 33 days, with
chicks fledging about 45 days after hatching. |
