Dicrurus macrocercus is a small Asian passerine bird, commonly referred to as the Black drongo. It is commonly known that this species would act violently toward larger birds that attempt to enter its territory.

1. Black Drongo: Invasive
Threat to Pacific Islands’
Native Birds
Dicrurus macrocercus is a small Asian passerine bird, commonly referred to
as the Black drongo. It is commonly known that this species would act
violently toward larger birds that attempt to enter its territory.
Following its introduction to a few Pacific islands, the black drongo has
spread and grown to such an extent that it is threatening to exterminate
native species of birds.
Black Drongo Appearance
Glossy black birds with a broad fork leading to the tail are called black
drongos. A tiny white patch typically appears at the base of the gape in
adults.
They sit erect on electricity wires, bare perches, or prickly shrubs thanks to
their small legs. Juveniles are similar to the white-bellied drongo in color
and may have some white barring or speckling towards the belly and vent.
First-year birds have white tips on their belly feathers.

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Distribution
Native to the Indus Valley, Black drongo can be found as far north as
Bangladesh, India, and Sri Lanka. They are summer tourists in northeastern
Afghanistan and northern Pakistan.
Certain populations migrate during certain seasons; populations in Korea
are known to do so. Black drongos live in open spaces such as savannas,
shrublands, grasslands, and pastures. They even inhabit towns.
Habits and Lifestyle
They usually devour insects attracted to artificial lights late in the evening
or night. Black drongo are often seen perched upright on naked perches,
power wires, or spiky vegetation. Usually, they hunt from their perch close
to the ground. Black drongos mostly hunt insects from the air, though they
can also gather food from the ground or shrubs.
They will occasionally fly toward tree branches in an attempt to agitate any
potential insects. In addition, insects are drawn to disturbed regions such
as grasslands and scrub areas by fires. Black drongos are often
accompanied by common mynas, cattle egrets, and other birds with similar
diets and habitats.
Among the larger species that black drongos prey on are crows and even
prey-seeking birds. may come to blows if they enter their nesting territory.
While there are many different sounds that black drongos can produce, the
most common one is the two-note “tee-hee” call.
Diet and Nutrition
Black drongos are insectivores, or carnivores. Their main food source
consists of insects such as grasshoppers, cicadas, termites, wasps, bees,
ants, moths, beetles, and dragonflies. Larger arthropods like centipedes

3. and scorpions are rarely caught by them, although they do enjoy feeding
on milkweed butterflies, which are usually disregarded by other predators.
They may occasionally eat fish, reptiles, small birds, or even bats. Black
drongos can occasionally eat grains in addition to visiting the blossoms of
trees such as Erythrina and Bombax for nectar and water.
Mating Habits
Black drongos live in pairs and are monogamous. In just one week, the
male and female construct the cup-shaped nest by inserting a thin layer of
sticks into the fork of a branch. The time of the first April showers is when
eggs are laid. A clutch typically consists of three eggs, sometimes up to
four.
The eggs measure 26 mm (1.0 in) in length and 19 mm (0.75 in) in width.
After 14–15 days of incubation by both parents, the eggs hatch. Sometimes,
helpers—children from the previous brood—will help feed the fledglings at
their parents’ nest.
After hatching, the chicks leave the nest after 16 to 20 days, but their
parents stay with them for a month to feed and look after them. In roughly
two years, black drongos reach reproductive maturity and begin to
reproduce.
Population
Population threats: There are no major threats to this species at present.
Population number: The IUCN Red List notes that the Black drongo is
locally common across its range, despite the lack of an estimate for its
overall population.
The national populations in China and Taiwan are expected to consist of
10,000–100,000 breeding pairs, 1,000–10,000 migrant people, and 10,000–
100,000 breeding couples. Currently, this species is classified as Least
Concern (LC) on the IUCN Red List.
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