Chrysocorythus estherae
The Indonesian Serin, Chrysocorythus estherae, is a diminutive yet captivating finch endemic to the high-altitude montane regions of Southeast Asia. Measuring approximately 11-12 cm (4.3-4.7 inches) in length and weighing a mere 10-15 grams, this species exhibits a characteristically finch-like stout bill. Males are generally olive-green above, heavily streaked, with a vibrant yellow rump – a key diagnostic feature – and yellowish-green underparts often brighter on the throat and breast. Dark...
Inhabits high-altitude montane forests, subalpine scrub, forest edges, and clearings, typically found between 1,200m and 4,000m (3,900-13,000 ft) elevation.
Feeds predominantly on small seeds from various montane plants, particularly grasses and members of the daisy family (Asteraceae), supplemented with small insects and spiders.
Indonesian Serins are primarily diurnal, active from dawn to dusk, often roosting communally in dense vegetation. They forage actively, either singly, in pairs, or in small, loose flocks, frequently joining mixed-species foraging parties. Their foraging strategy involves gleaning seeds from low v...
The Indonesian Serin is a non-migratory resident species with a highly fragmented distribution across several island groups in Indonesia and the Philippines. In Indonesia, it is found on the mountain ranges of Sumatra (*C. e. vanderbilti*), Java (*C. e. estherae*), Sulawesi (*C. e. celebensis*), ...
Least Concern
- The Indonesian Serin is one of the highest-dwelling finches in its range, frequently found at elevations exceeding 3,000 meters (9,800 feet) above sea level. - Its vibrant yellow rump is a key field mark, contrasting sharply with its otherwise streaky olive-green plumage, especially in males. -...