The Indian myna, also known as the common myna, is native to South Asia. Its natural breeding range stretches from Afghanistan through India and Sri Lanka to Bangladesh. From there, humans deliberately carried it to countries across the world starting in the 1800s, mostly in failed attempts to control insect pests. Today it lives on every continent except Antarctica and holds a spot on the IUCN’s list of 100 of the world’s worst invasive species.
Native Range in South Asia
The common myna (Acridotheres tristis) belongs to the starling family. In its homeland, it thrives across a wide band of South Asia, from the dry plains of Afghanistan through the Indian subcontinent, Sri Lanka, and into Bangladesh. It’s a bird that naturally gravitates toward human activity, feeding in agricultural fields, gardens, and towns. That comfort around people is exactly what made it so easy to transplant elsewhere.
Why Humans Spread It Around the World
In the mid-1800s, farmers and governments in several countries were desperate for a solution to crop-destroying insects. Acclimatisation societies, organizations dedicated to introducing “useful” foreign species, saw insect-eating birds as a natural form of pest control. The Indian myna, bold and abundant in its home range, seemed like an obvious candidate.
In Australia, common mynas were brought to Melbourne in 1862 specifically to control insect pests in market gardens. They didn’t work. Despite that failure, they were transported from Melbourne to other parts of the country, including north Queensland, where farmers hoped they’d tackle insects damaging sugar cane. The pattern repeated itself: introduction, failure at pest control, and then further spread.
New Zealand followed a similar path. Acclimatisation societies formed there in the 1860s and 1870s, and farmers across the country were calling for foreign insectivorous birds to deal with crop damage. Mynas were one of many species shipped in during this period. In South Africa, the population traces back to captive birds that escaped in Durban in 1902. A century later, the species had become abundant throughout much of the country.
The bird was also introduced to parts of Southeast Asia, the Middle East, Hawaii, and islands across the Pacific and Indian Oceans, often for the same reason: insect control that rarely panned out.
Why It Thrived in New Countries
The Indian myna is what ecologists call a commensal species, meaning it lives in close association with humans. It doesn’t need pristine forest or untouched habitat. It needs towns, farms, garbage, and buildings with cavities for nesting. In South Africa, researchers found the birds more frequently in areas with greater human population density and more developed land. They’re seldom encountered away from human settlement, even in regions that are mostly natural.
This dependence on human environments is both the bird’s greatest advantage and the reason it spreads so predictably. As towns grow, the myna follows. It eats nearly anything: insects, fruit, scraps, pet food, and food waste. It breeds readily, nests in roof cavities, drainpipes, and tree hollows, and aggressively defends its territory against other birds.
Damage to Native Birds
The Indian myna’s most serious impact is on native cavity-nesting birds. Many native species, from parrots to small songbirds, depend on tree hollows for breeding. Mynas compete fiercely for these limited nesting sites, and they don’t just outcompete other birds passively. They actively attack.
A controlled study in Israel documented just how aggressive the takeover can be. Researchers set up nest boxes and monitored what happened when mynas encountered breeding pairs of great tits (a small native songbird). In 46% of great tit nests, the eggs or chicks were destroyed by predators, and common mynas were responsible for half of those losses. The mynas chased incubating females out of nest boxes, ate their eggs, killed nestlings, and then built their own nests on top of the destroyed ones within two weeks. In total, mynas destroyed 27 eggs and killed one nestling in that experiment alone. Nearly a quarter of all great tit breeding attempts in exposed nest boxes failed because of myna aggression.
This pattern plays out wherever the species has established itself. In urban areas across Europe and the Middle East, mynas and other invasive cavity nesters monopolize the majority of available nest sites, leaving native species with nowhere to breed.
How to Tell It Apart From Native Birds
In Australia, the Indian myna is frequently confused with the noisy miner, a native honeyeater. The two are completely unrelated. The noisy miner is a honeyeater; the common myna is a starling. Knowing which one you’re looking at matters, because one is a protected native species and the other is an invasive pest.
The easiest way to tell them apart is body color. The common myna has a brown body, a black head, and a yellow beak, with yellow skin around the eyes and yellow legs. The noisy miner has a gray body with similar yellow facial features. The clearest field mark is a white patch on the common myna’s wings, visible even in flight, which the noisy miner lacks entirely. Their calls are different too: noisy miners make sharp piping and chipping sounds, while common mynas produce a more rolling, churning song.
Current Global Status
The Indian myna is listed as number three on the Global Invasive Species Database’s roster of 100 of the world’s worst invasive alien species. In South Africa, researchers describe the bird as undergoing a rapid and extensive range expansion. In Australia, populations have spread well beyond Melbourne into urban and suburban areas up and down the east coast. Across its introduced range, the species continues to expand wherever human development creates suitable habitat, which is nearly everywhere people live.