About Tarsiger johnstoniae (Ogilvie-Grant, 1906)
The collared bush-robin (Tarsiger johnstoniae) is approximately 12 cm (4.7 in) long, and adult males and females have different plumage. Males have a slate-black head with a white supercilium, and their rufous upper breast, mantle, and scapulars form a visible collar. Their back is sooty-black, wings are black to brownish-black, and their tail is black. Males have buffish-yellow lower breasts, with bellies ranging from grey-white to buffish-olive, and both their beaks and legs are black. Females have a less distinct supercilium; their upperparts are mostly dull olive-brown, while their wings and tail are dark brown. Female underparts are variable: their throat and breast are warm brown, though the throat may sometimes appear blackish, and the breast can be pale yellow or yellowish-olive. Juvenile collared bush-robins can be told apart from females by their pale buff streaks and spots. This species is endemic to Taiwan, where it inhabits montane and subalpine forests, typically at elevations between 2,000 and 2,800 m (6,600–9,200 ft), and it is sometimes found above the tree line. It moves down to lower elevations during the winter. It lives in the undergrowth of coniferous forests that contain shrubs and bamboo, and can also be spotted in parks and along roads.
