Javan Sunbird Aethopyga mystacalis

Medium-sized sunbird of foothill forest and forest edge on Java; uncommon to rare in upper montane and lowland habitats. Forages actively in pairs, mixed flocks, or singly. Both sexes are very similar to Crimson Sunbird, but note Javan's bright white belly and sides. Female Javans can also be confused with White-flanked and the Leptocoma sunbirds, but have more white on the sides and belly than those species. Song is a very flat and insect-like series of dry “chit” notes; also gives a sparrow-like “chiweet.”