Circus approximans
The Swamp Harrier, *Circus approximans*, is a majestic raptor of Australasia, typically measuring 50-58 cm in length with an impressive wingspan of 120-145 cm. Females, significantly larger than males, weigh 600-900g, compared to the males' 400-600g. Adults are characterized by their largely brown upperparts and streaky rufous/cream underparts, notably displaying a distinct white rump patch which is a key identification feature. Immature birds are a darker, more uniform chocolate brown. This ...
Primarily found in freshwater and brackish wetlands, including swamps, marshes, reedbeds, and wet grasslands. Also utilizes agricultural lands like sugar cane and cereal crops, as well as open woodlands and coastal areas, from sea level up to 1500 meters.
Mainly preys on small mammals (rodents, rabbits), birds (waterfowl, passerines), reptiles (lizards, snakes), amphibians (frogs), and large insects. Forages by quartering low over its habitat, often snatching prey from the ground or water surface.
Diurnal, the Swamp Harrier is often seen hunting during the day, though it may roost communally in dense reedbeds or other vegetation outside the breeding season. Its distinctive foraging strategy involves quartering low over open ground or water, gliding with its wings in a shallow dihedral, bef...
The Swamp Harrier boasts a broad distribution across Australasia and the South Pacific. Its core breeding range encompasses mainland Australia (excluding the arid interior), Tasmania, the North and South Islands of New Zealand, New Guinea, and numerous Pacific island groups including Fiji, Vanuat...
Least Concern
- The Swamp Harrier is the largest harrier species found in Australasia. - Its unique low, slow flight pattern with wings held in a 'V' shape is known as 'quartering', a signature hunting style for all harriers. - These opportunistic hunters are known to steal prey from other raptors or even larg...