Orange-billed Babbler (Argya rufescens)

The Orange-billed Babbler (Argya rufescens), also known as the Sri Lankan Rufous Babbler or Ceylon Rufous Babbler, is a highly social bird endemic to the wet-zone forests of Sri Lanka. It inhabits tropical lowland and montane rainforests, forest edges, and well-wooded areas, with strong populations in protected forests such as Sinharaja, Kitulgala, and the Knuckles region. This medium-sized babbler is easily recognized by its warm rufous-brown plumage, grey crown and nape, bright orange bill, and pale eyes. Unlike many forest birds, it is usually detected by its constant chatter before it is seen, as family groups of 7–15 individuals move actively through the undergrowth and lower canopy. It is a key member of Sri Lanka's mixed-species feeding flocks, often acting as a sentinel species whose loud calls alert birdwatchers to the presence of other forest birds. Although it is capable of flight, its wings are short and rounded, making it a weak flyer that prefers hopping and moving through dense vegetation.

The Orange-billed Babbler is omnivorous, feeding mainly on insects, spiders, caterpillars, beetles, and other small invertebrates, while also consuming fruits, berries, and other plant material when available. It forages cooperatively, with flock members constantly maintaining contact through a variety of chattering, squeaking, and chirping calls. Breeding usually takes place during the rainy seasons, when pairs construct a well-hidden cup-shaped nest within dense shrubs or trees. The female typically lays two to three greenish-blue eggs, and both parents, often assisted by other members of the flock, help defend the nest and care for the chicks. Although the species is currently classified as Least Concern, it depends heavily on intact rainforest habitats and is vulnerable to forest fragmentation and habitat degradation. The Orange-billed Babbler is one of Sri Lanka's most iconic endemic birds, appearing on the 2010 Sri Lankan Rs. 100 banknote and a Sri Lankan postage stamp, highlighting its importance in the country's natural heritage.