Red-billed Leiothrix

The red-billed leiothrix is a member of the family Leiothrichidae, native to southern China and the Himalaya, 14–15.5 cm long and generally olive green, with a yellow throat with orange shading on the breast. Adults have bright red bills and a yellowish-white ring around the eyes that extends to the beak; the back is dull olive green, the cheeks and side of the neck bluish grey, females are somewhat duller than males and juveniles have black bills. It has also been introduced elsewhere, with small populations of escapees in Japan since the 1980s (Wikipedia, general species account).

It is generally resident, though in Bhutan some altitudinal migration is recorded, with birds breeding at 1,800–3,400 m in summer and descending to 600–2,800 m in winter. It eats invertebrates, including flies, moths, wasps, spiders, millipedes and molluscs, and fruit and seeds. Groups of about 10–30 are usual in the non-breeding season, and in the breeding season the birds split into territorial pairs (Wikipedia, general species account).