Outside of the breeding season, Bali mynahs tend to flock together in groups of 30 to 60 birds. When breeding begins, from October to November, they pair off, and the males become very competitive. When a male wants to get the attention of his prospective mate, he will lift his white-feathered crest and bob his head in a kind of dance.
Bali mynahs eat insects and fruits. They have many predators in their forest homes, including snakes, monitor lizards, monkeys, and birds of prey.
Bali mynahs make their nests in tree holes. They lay two to four blue-green eggs, and incubate them for 13–16 days. Sometimes both sexes will participate in incubation; other times the female does it alone. Young are born featherless and with closed eyes. Both parents share the duty of feeding the chicks until they are old enough to forage on their own. The chicks start to fledge at 15–25 days of age. Bali mynahs can live up to 25 years in zoos.
Population Status & Threats
The Bali mynah is listed as Critically Endangered by the IUCN. With its tiny population and extremely limited range, the threats to its survival are great. In 1990, the wild population was estimated at just 15 birds. Conservationists helped boost this number a bit, but the population fluctuates between 6 and 50 birds. Today, illegal poachers continue to capture these birds for the pet trade, and predation, disease, and other dangers mean they remain on the brink of existence.