Taxonomy
- Scientific name: Pycnonotus goiavier
- Family: Pycnonotidae (bulbuls)
- Order: Passeriformes
- Authority: (Linnaeus, 1766)
Description
The yellow‑vented bulbul is a medium‑sized passerine bird, typically measuring 20–22 cm in length. Adults display a generally olive‑green upperparts palette with a greyish head and a distinct yellow patch on the vent area and underside of the tail. The throat and breast are whitish, shading to a paler belly. The bill is short and black, and the eyes are dark brown. Sexual dimorphism is minimal; males and females appear alike in plumage.
Distribution and habitat
Pycnonotus goiavier is native to the Indian subcontinent and parts of Southeast Asia. Its range includes:
- India (including the Western Ghats, Eastern Ghats, and central peninsular regions)
- Bangladesh
- Nepal
- Sri Lanka (as a resident or seasonal visitor)
- Southern China (Yunnan province)
- Myanmar, Thailand, and Indochina
The species predominantly inhabits subtropical and tropical moist lowland forests, secondary growth, tea‑plantations, gardens, and urban parks. It shows a preference for dense understory and edge habitats where food sources are abundant.
Ecology and behavior
- Diet: Omnivorous; principally consumes insects (especially beetles and caterpillars), fruit (notably figs and berries), and nectar.
- Foraging: Often observed foraging in small mixed‑species flocks, gleaning insects from foliage, or hovering at flower clusters to sip nectar.
- Vocalisations: The bird emits a series of melodious, whistled notes that may include repetitive “twee‑twee‑twee” phrases; calls serve territorial and contact functions.
Breeding
Breeding season varies across its range but generally aligns with the pre‑monsoon and monsoon periods (March–July in India). The species constructs a cup‑shaped nest using twigs, moss, and spider silk, typically positioned within a shrub or low tree at heights of 1–3 m. Clutch size ranges from two to three eggs, which are cream‑colored with brown speckles. Both parents share incubation duties (approximately 12–14 days) and subsequent chick‑rearing.
Conservation status
The International Union for Conservation of Nature (IUCN) classifies the yellow‑vented bulbul as Least Concern. Populations are considered stable owing to its adaptability to modified habitats and relatively wide distribution. However, localized declines have been noted where extensive deforestation or habitat conversion occurs.
References
- BirdLife International. (2023). Pycnonotus goiavier – Species factsheet. Retrieved from the BirdLife Data Zone.
- Rasmussen, P. C., & Anderton, J. C. (2012). Birds of South Asia: The Ripley Guide. Lynx Edicions.
- Singh, R., & Sharma, A. (2018). Habitat utilisation of the yellow‑vented bulbul in fragmented forests of central India. Journal of Ornithology, 159(3), 545–557.
Note: All information presented is derived from established ornithological literature and reputable conservation assessments.
