The white-rumped shama (Copsychus malabaricus) is a small passerine bird of the family Muscicapidae. Native to densely vegetated habitats in the Indian subcontinent and Southeast Asia, its popularity as a cage-bird and songster has led to it being introduced elsewhere.
They typically weigh between 28 and 34 g (1.0 and 1.2 oz) and are around 23–28 cm (9–11 in) in length. Males are glossy black with a chestnut belly and white feathers on the rump and outer tail. Females are more greyish-brown, and are typically shorter than males. Both sexes have a black bill and pink feet. Juveniles have a greyish-brown colouration, similar to that of the females, with a blotchy or spotted chest.
They are native to South and Southeast Asia, but have been introduced to Kauai, Hawaii, in early 1931 from Malaysia (by Alexander Isenberger), and to Oahu in 1940 (by the Hui Manu Society). Their popularity as a cage bird has led to many escaped birds establishing themselves. They have been introduced to Taiwan where they are considered an invasive species, eating native insect species and showing aggression towards native bird species.
In Asia, their habitat is dense undergrowth especially in bamboo forests. In Hawaii, they are common in valley forests or on the ridges of the southern Koolaus, and tend to nest in undergrowth or low trees of lowland broadleaf forests. source