The Australasian Harrier is a bird of the wetlands, often seen soaring over marshes and grasslands in search of its next meal. It's a medium-sized raptor with a distinctive white rump patch.
These birds are known for their impressive hunting skills, using their acute hearing and exceptional vision to locate small mammals and birds in the wetlands. They're also skilled at catching fish and other aquatic prey.
The Australasian Harrier's breeding habits are closely tied to the availability of food in the wetlands. They typically breed in the summer months, with the female laying a clutch of 3-4 eggs in a nest made of sticks and other plant material.
Additional reading: Australasian Gannet
Distribution and Habitat
The swamp harrier is widespread across Australasia, including much of Australia and New Zealand. It's a bird of prey that can be found in wetlands and well-watered open country.
You can spot the swamp harrier in many islands in the south-west Pacific region, including Fiji, Vanuatu, New Caledonia, and some subantarctic islands. It's a pretty adaptable bird.
The swamp harrier only became established in New Zealand within the last few hundred years, after lowland forests were cleared by the first Polynesian settlers. This is a relatively recent development in the bird's history.
It's worth noting that the swamp harrier is now very common in New Zealand, especially in open farmland. This is a stark contrast to the situation before European settlement.
About the Australasian Harrier
The Australasian Harrier is a common native bird found throughout New Zealand, including coastal areas, wetlands, pine forest, farmland, and high-country areas. It's amazing how adaptable they are to different environments.
Harriers have been self-introduced to New Zealand about 1000 years ago and have thrived in a modified environment. This is a testament to their ability to adapt to changing circumstances.
Kāhu, as they're also known, prey on small to medium-sized birds and mammals, insects, lizards, and frogs. They're skilled hunters that can take down a wide range of prey.
Background Information
The Australasian harrier/kāhu is a common native bird found throughout New Zealand, including coastal areas, wetlands, pine forest, farmland, and high-country areas.
It's estimated that harriers self-introduced to New Zealand about 1000 years ago, where they've thrived in a modified environment.
Harriers are partially protected under the Wildlife Act, allowing for controlled bird populations to support conservation efforts for fully protected wildlife.
Their diet consists of small to medium-sized birds and mammals, insects, lizards, and frogs, with road-kill carrion being a significant contributor, especially in winter.
Harriers are opportunistic hunters, taking advantage of available food sources in their environment.
Description
The swamp harrier is a striking bird, with a dark brown plumage that lightens with age and a distinctive white rump.
The harrier's wingspan is quite impressive, ranging from 118 to 145 cm (3 ft 10 in to 4 ft 9 in).
Females are significantly larger than males, with a notable difference in weight.
Adults of the species typically weigh between 580 to 1,100 g (1.28 to 2.43 lb), with the average weight of males being around 640 g (1.41 lb) and females averaging 870 g (1.92 lb).
Frequently Asked Questions
Is the harrier hawk native to NZ?
Yes, the harrier hawk is native to New Zealand, having arrived from Australia less than 1,000 years ago. However, it's worth noting that it co-existed with the larger Eyles harrier, a native species that had already adapted to forest hunting.
What is the Maori word for harrier hawk?
The Maori word for harrier hawk is "kāhu". In Maori culture, the kāhu is considered a bird of noble character.
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