Bronzed Drongo

The most useful field mark is its small, compact build combined with a slender, deeply forked tail whose outer feathers flare outward slightly, distinguishing it from the larger black drongo. Adults weigh only about 0.026 kilograms, among the smallest of the drongos.

The plumage shows a strong metallic gloss with a spangled appearance across the head, neck and breast, while the lores appear velvety and the ear coverts are duller than the rest of the head. This spangled sheen is more pronounced than in the black drongo, giving the bronzed drongo its glittering look in good light.

Immature birds differ from adults in having axillaries tipped in white, and young birds overall appear duller and brownish with less spangling than adults.

Across its range, the species shows some geographic variation: the nominate race occurs from India to the northern Malay Peninsula, with southern Indian birds closely matching the malayensis form of Burma in size, suggesting the variation may be clinal. The Taiwanese population, treated as the subspecies braunianus, lives in the island's interior mountains, while malayensis extends from Selangor south into Sumatra and Borneo.

The bronzed drongo occupies a broad range stretching from the Western and Eastern Ghats of India and the lower Himalayas of western Uttaranchal eastward through Indochina and Hainan, and on into the Malay Peninsula, Sumatra and northern Borneo, spanning an estimated 4,640,000 square kilometers.

It is found almost exclusively in moist broadleaved forest, favoring dense forest cover rather than open or disturbed habitats. The species is described as exclusively forest-dwelling, rarely if ever venturing beyond these wooded environments.

Observation records show more sightings in the first months of the year and again toward the year's end, with a dip in the middle months, which may reflect seasonal presence or visibility rather than actual changes in numbers, since these figures reflect observation effort rather than a complete population count.

Bronzed drongos are typically encountered alone or in small groups of two to three, actively foraging for insects beneath the forest canopy through aerial sallies from favored perches. They will sometimes join mixed-species foraging flocks, taking advantage of insects flushed by other birds.

They are sedentary, remaining resident within their forest habitat year-round rather than migrating. Despite their small size of about 24 centimeters, they are notably aggressive and fearless, willing to attack much larger species that threaten their nest or young.

Their breeding season runs from February to July, during which they build a cobweb-covered cup nest in a tree that often appears whitish from the webbing.

1. The bronzed drongo is one of the smaller members of the drongo group, distinguished from relatives like the black drongo by its more compact size and deeper tail fork.
2. Its range spans an unusually wide stretch of Asia, from the Himalayas of northwestern India through southern China, Hainan, and Taiwan, down through the Malay Peninsula to Sumatra and Borneo.
3. The species captures insects specifically in the shaded, dim light beneath the forest canopy, a specialized foraging niche compared to more open-country relatives.