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This is a bird of dry scrub, open forest, plains and cultivated lands. In its native range it is rarely found in mature forests. A study based on 54 localities in India concluded that vegetation is the single most important factor that determines the distribution of the species.
Red-vented bulbuls were introduced into Fiji in 1903 by indentured labourers from India, becoming widespread. They were introduced to Tonga in 1943 and became common on Samoa by 1957. They became established on the Tongan islands of Tongatapu and Niuafo'ou. They were introduced into Melbourne around 1917 but were not seen after 1942.
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They established in Auckland in the 1950s but were exterminated and another wild population was detected and exterminated in 2006. In 2013 more were found, and authorities offered a $1000 reward for information that led to a bird's capture. They prefer dry lowland habitat in these regions. They were first observed breeding on the Canary Islands in 2018. They are considered as pests because of their habit of damaging fruit crops. Methiocarb and ziram have been used to protect cultivated Dendrobium orchids in Hawaii from damage by these birds; however, they learn to avoid the repellent chemicals. They can also disperse the seeds of invasive plants like Lantana camara and Miconia calvescens.
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