Tibetan Serin

The Tibetan serin, or Tibetan siskin, is a true finch about 12cm long including the tail, found in Bhutan, China, India, Myanmar and Nepal. It lacks yellow panels on the wings in all plumages. Adult males have olive-greenish upperparts, yellow underparts, a yellowish-green rump and a yellow supercilium, and juveniles are duller green with buff fringes and paler or heavily streaked underparts (Wikipedia, general species account).

Tibetan serins generally breed in mixed forest and spend their winter in alder. Birders from West Bengal found it near the Varsey Rhododendron Sanctuary in Sikkim in March 2013. The source read gives no diet or nest information, so none is stated.