You often find Javan Myna in large groups. They are brave and not very afraid of humans. The birds scavenge in a group, a minimum of two but usually three or more; one bird feeding and another one usually at a vantage point for keeping an eye out.
Javan Myna (Acridotheres javanicus), also known as Jalak Kerbau by locals. Also known as Jalak Bali by locals, they restricted only in the island of Bali and Java, Indonesia. They usually live in grasslands, rice fields, gardens, mangroves, villages, and urban area.
Diet & Behaviour
The Javan Myna is omnivorous and eats seeds, fruit, nectar, insects and human waste. It is often found in large groups. Its voice is similar to that of the common myna. It builds its nest in holes. The birds scavenge in groups, minimum two but usually three or more.
With all except one feeding and one usually at a vantage point keeping a look out. If the bird that is keeping watch sees anything that might pose a threat, it alarms the group members with a high pitch tweet and they all flee the area swiftly. If one of them is separated, they would tend to tweet to attract other mynas of their kind to come over.
This birds have medium size, weigh about 100 gram with 21 – 23 cm body length. The Javan Myna is mainly black. The wings are brownish-black, and the primaries have white bases. The undertail-coverts are white. There is a short crest on the forehead. It’s beak, legs and feet are yellow. The eyes are lemon-yellow. The immature is browner.
While breeding the Javan Myna typically lays 2-5 eggs at a time, while the incubation period only takes 13-14 days. In the wild, this bird can have life span about 12 years.