Black Baza

Identification

The black baza is a small and distinctively coloured raptor, ranging from 30 to 35 cm in length with a wingspan of 66 to 80 cm and weighing 168 to 224 g. Its most striking feature is a prominent upright crest that, combined with contrasting plumage patterns, makes it difficult to misidentify when perched. The species exhibits sexual dimorphism: males display white scapulars, secondary coverts and secondaries, with few chestnut bands on the underside, while females show white only on the scapulars and considerably more chestnut banding below. Like others in the genus Aviceda, black bazas possess two tooth-like indentations on the edge of the upper bill. In flight, they resemble crows and are often seen in small groups or flocks, particularly during migration.

Range & Habitat

The black baza is found in the forests of Northeast India, the eastern Himalayas, China and Southeast Asia. Many populations are migratory: those in the Indian region winter in the south of the Peninsula and Sri Lanka, while populations in eastern Nepal and northeastern India winter in Indo-China and the Malaya Peninsula. In recent decades, some birds in Hong Kong have shifted from being summer visitors to establishing themselves as year-round residents in small numbers. These raptors inhabit dense forests and are often found perched on bare branches of tall trees rising above the forest canopy, frequently in small groups.

Behaviour & Diet

Black bazas are somewhat crepuscular, showing increased activity at dusk and in overcast weather. They feed mainly on insects, capturing them through aerial sallies or by plucking them from leaves, always seizing prey with their feet. They have been observed attempting to capture small birds such as wagtails by making dashing attacks into flocks, and they regularly join mixed-species foraging flocks. Remarkably, they have also been noted feeding on the fruits of the oil palm. These birds are gregarious at their roosts during migration, sometimes appearing in large numbers at key passage points. Their calls include a distinctive "chu-weep" somewhat similar to large cuckoo-shrikes, along with soft squeals, whistles and shrill gull-like mewing. Unusually for raptors, they are said to emit a disagreeable, "bug-like" odour.

Best Time & Places to See It

In northeastern India, birds begin breeding in April, making spring an excellent time to observe them. Major migration bottlenecks offer spectacular viewing opportunities: the Thai peninsula at Chumphon, for instance, sees black bazas accounting for nearly 40% of raptors on passage. Winter visitors can be found in southern India, particularly in the Western Ghats and Eastern Ghats, with records from locations including Guindy National Park near Chennai, areas near Trivandrum and Bangalore, and Point Calimere. Recent studies suggest the species may be a regular winter visitor across eastern peninsular India rather than merely a passage migrant.

Photography Tips

The black baza's prominent crest and distinctive plumage make it relatively easy to identify once located. Look for them perched on bare branches above the forest canopy, particularly in small groups. Their preference for activity during overcast conditions and at dusk may require faster film speeds or higher ISO settings. During migration, large congregations at roosts provide opportunities for flock photography. Their small size—under 35 cm in length—means a good telephoto lens is essential. Sexual dimorphism offers the chance to document both male and female plumages, with females showing more extensive chestnut banding that creates striking compositional contrast.