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Drongo

life science Maturity 11-13 Next article →

Drongos are specialized birds belonging to the family Dicruridae. They are passerine birds found throughout the Old World tropics.

These birds are essential parts of their ecosystems as active predators. They play a role in controlling insect populations and small bird numbers. Drongos are mostly recognized by their dark coloration. Most species appear black or dark grey, though some possess metallic tints. They typically have short legs and maintain an upright stance when perched.

Fork-tailed Drongo (Dicrurus adsimilis) 2
Fork-tailed Drongo (Dicrurus adsimilis) 2

Many species feature distinctive forked tails. Some Asian varieties even possess elaborate tail decorations.

Drongos are highly efficient insectivorous hunters. This means they primarily eat insects, though they also consume small birds. They utilize two main hunting methods to secure prey. First, they can flycatch, which involves catching prey while in flight. Second, they hunt on the ground to find food.

Square-tailed Drongo (Dicrurus ludwigii) (cropped)
Square-tailed Drongo (Dicrurus ludwigii) (cropped)

Despite their relatively small size, drongos are remarkably aggressive. They are known to be fearless when defending their territory. If a predator threatens their nest or young, they will attack much larger species. A typical drongo nest is built high in a tree and contains two to four eggs.

One of the most fascinating behaviors of the drongo is mimicry. Mimicry is the ability to imitate the sounds of other living things. Some species, such as the greater racket-tailed drongo, are highly accomplished mimics. They can imitate the calls of various birds and even some mammals.

Greater Racket-tailed Drongo Dicrurus paradiseus (Linnaeus, 1766) (16169002507)
Greater Racket-tailed Drongo Dicrurus paradiseus (Linnaeus, 1766) (16169002507)

In the Kalahari Desert, fork-tailed drongos use this skill for deception. They emit fake alarm calls that signal a predator is nearby. When other animals hear these calls, they flee to find safety. This causes the animals to abandon their current food source. The drongo then moves in to claim the meal. This deceptive strategy allows them to obtain up to 23% of their total food.

Drongos are incredibly versatile with their vocalizations. They do not rely on just one type of fake call. A single drongo may use as many as 51 different imitated calls. If one specific call fails to work, they may try another. This happens because animals can become habituated, or used to, a repeated sound.

Ashy drongo ,Dicrurus leucophaeus
Ashy drongo ,Dicrurus leucophaeus

Researchers studied pied babblers to observe this reaction. The babblers ignored an alarm call that was repeated three times without danger. However, the babblers continued to respond when the drongo switched to a different call. Some scientists believe this level of complexity suggests drongos might possess a "theory of mind." This is a cognitive concept rarely seen in animals outside of humans.

Scientific study of the drongo began in the early 19th century. The French ornithologist Louis Pierre Vieillot introduced the genus *Dicrurus* in 1816. Later, in 1841, the English zoologist George Robert Gray designated the balicassiao (*Dicrurus balicassius*) as the type species.

Dicrurus balicassius
Dicrurus balicassius

The name *Dicrurus* is derived from Ancient Greek words. The word *dikros* means "forked," and *oura* means "tail." The common name "drongo" has different origins. It comes from an indigenous language in Madagascar, where it referred to the crested drongo. In Australia, the word became a mild insult meaning "idiot." This usage began in the 1920s after a racehorse named Drongo never won a race.

There are currently 28 species within the genus *Dicrurus*. These birds have a wide geographic distribution across the tropics.

Bronzed Drongo I IMG 1677
Bronzed Drongo I IMG 1677

Scientific evidence suggests the family is likely of Indo-Malayan origin. They began colonizing Africa approximately 15 million years ago. Their movement into Australasia was more recent, occurring around 6 million years ago. Species can be found in diverse locations. For example, the velvet-mantled drongo lives in parts of Africa like Nigeria and Cameroon. In the Philippines, you can find the Palawan drongo and the Tablas drongo. Other species like the spangled drongo are found in Australia and New Guinea.

The taxonomy of this group has changed as science has advanced. The family was formerly thought to include two different genera: *Chaetorhynchus* and *Dicrurus*. The genus *Chaetorhynchus* contained only one species, the pygmy drongo. However, researchers discovered morphological and genetic differences in this bird.

Crested Drongo, Ankarafantsika National Park, Madagascar
Crested Drongo, Ankarafantsika National Park, Madagascar

Because of these findings, it was moved to the fantail family and renamed the drongo fantail. Current classifications by researchers like Christidis and Boles suggest even broader connections. They expanded the family to include subfamilies like Rhipidurinae and Monarchinae. This shows how our understanding of bird relationships continues to evolve through genetic study.

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🖼️ Images & Media (22)
File:Square-tailed Drongo (Dicrurus ludwigii) (cropped).jpg
Square-tailed Drongo (Dicrurus ludwigii)...
File:SharpesDrongo.jpg
SharpesDrongo.jpg
File:Dicrurus atripennis 111213.jpg
Dicrurus atripennis 111213.jpg
File:Fork-tailed Drongo (Dicrurus adsimilis) 2.jpg
Fork-tailed Drongo (Dicrurus adsimilis) 2.jpg
File:Velvet-mantled Drongo from Canopy Walkway - Kakum NP - Ghana 14 S4E1498 (cropped).jpg
Velvet-mantled Drongo from Canopy Walkway...
File:Dicrurus aldabranus 59442457 (cropped).jpg
Dicrurus aldabranus 59442457 (cropped).jpg
File:Crested Drongo, Ankarafantsika National Park, Madagascar.jpg
Crested Drongo, Ankarafantsika National...
File:Black Drongo Dicrurus macrocercus (Vieillot, 1817) (7005202663).jpg
Black Drongo Dicrurus macrocercus...
File:Ashy drongo ,Dicrurus leucophaeus.jpg
Ashy drongo ,Dicrurus leucophaeus.jpg
File:Thimindu White bellied Drongo 1.jpg
Thimindu White bellied Drongo 1.jpg
File:Crow-billed Drongo (Dicrurus annectans) - Flickr - Lip Kee (cropped).jpg
Crow-billed Drongo (Dicrurus annectans) -...
File:Bronzed Drongo I IMG 1677.jpg
Bronzed Drongo I IMG 1677.jpg

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