Gavilán acollarado

Identification

The collared sparrowhawk is a small, fierce and finely built bird of prey, measuring 29–38 cm in length with a wingspan of 55–78 cm. Males average 126 g while females weigh around 218 g. The species is characterised by its rounded wings, long square tail, and distinctive slender feet—notably, the last segment of the middle toe projects beyond the claws of other toes. Adults display slate-grey upper parts, sometimes with a brown wash, and a distinctive chestnut half collar. The underparts are finely barred in rufous and white, while under wings and tail show delicate barring. The cere ranges from cream to olive-yellow, with bright yellow eyes and yellow legs and feet.

Juveniles are noticeably different, with brown upper parts and pale streaks on the head and nape. Their feathers show fine rufous edges, while underparts are white with heavy brown streaks on the breast and coarse brown barring on the belly. The sexes are similar in appearance, though males are notably smaller than females, and juveniles possess a cream to greenish-yellow cere with brown to pale yellow eyes.

Range & Habitat

The collared sparrowhawk is widespread throughout mainland Australia, Tasmania, and New Guinea, as well as nearby smaller islands. The species is found in all habitats except the driest deserts, and can occasionally be spotted in urban areas and even cities. Although widespread across its range, the bird is generally uncommon, though it may be more common in forests in the tropics and subtropics. The species is generally resident, though it may be partly migratory; however, its movements remain poorly understood.

Behaviour & Diet

The collared sparrowhawk is a specialist hunter of small birds, relying on stealth and surprise to catch its prey. The crested pigeon and spotted bowerbird represent the largest birds recorded as prey. Beyond birds, the species also catches insects, lizards, and small mammals including small bats. Most prey weighs less than 100 g, though occasional items may exceed 200 g. The sparrowhawk hunts through short-stay perch hunting from concealed positions in foliage, punctuated by short, often undulating flights between trees, or alternatively through low, fast flight and hedge hopping. Prey is seized either in direct flying attacks or via stealthy glides.

Breeding occurs from July to December, with pairs nesting solitarily in stick platforms measuring 27–32 cm across and 12–15 cm deep, typically lined with green leaves and positioned 4–39 m above ground in the forks of living trees. Clutches usually contain three or four eggs, ranging from two to five. Incubation lasts 35 days with a nesting period of about 28–33 days, followed by up to 6 weeks of dependence after fledging before young disperse. Sexual maturity is reached at one year, and birds may breed in juvenile plumage.

Best Time & Places to See It

The collared sparrowhawk is present year-round across its range, making it potentially observable in any season, though viewing opportunities are challenging due to the species' secretive nature and generally uncommon status. The bird is most likely to be encountered in forested habitats, particularly in tropical and subtropical regions where it may be more common. Urban and suburban areas with suitable vegetation patches occasionally host these birds, offering unexpected opportunities for attentive observers.

Photography Tips

Photographing the collared sparrowhawk requires patience and stealth, as the species is secretive and alert. Watch for the bird perching motionless in dense foliage before launching hunting flights—these moments of action offer the best photographic opportunities. The bird's bright yellow eyes, chestnut collar, and finely barred plumage are distinctive features worth capturing. Early morning and late afternoon often provide the best light and highest activity levels. Positioning yourself quietly near suitable habitat and remaining patient will increase your chances of documenting this elegant and elusive raptor.