Overview

Distribution

Range

Australasian region and sw Oceania.

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Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
  • Freshwater
  • Marine
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Source: IUCN

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Circus approximans

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
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Source: IUCN

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Population

Population
The population is estimated to number in the tens of thousands.

Population Trend
Stable
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Wikipedia

Swamp Harrier

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.

Description[edit]

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 58 cm (20–23 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[edit]

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.

Behaviour[edit]

Diet[edit]

The Swamp Harrier mainly feeds on ground birds and waterbirds, rabbits and other small mammals, reptiles, frogs, and fish. During the winter months harriers feed to a large extent on carrion, including roadkill.

Breeding[edit]

This species nests on the ground, often in swamps, on a mound in reeds or other dense vegetation. The clutch size may range from two to seven, but is usually three or four. The incubation period is about 33 days, with chicks fledging about 45 days after hatching.

See also[edit]

Notes[edit]

References[edit]

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