How to identify the Yellow-vented Bulbul

To correctly identify the Yellow-vented Bulbul (Pycnonotus goiavier), check each of these features. Birds can be tricky: habit, habitat, and call often confirm a sighting that a single photo cannot.

Size at a glance

Length

16-20 cm

Wingspan

25-30 cm

Weight

20-35 g

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults have a dull brown back, wings, and tail. The head is dark brown to blackish with a prominent white supercilium (eyebrow stripe) and a white patch below the eye. The throat and breast are white, transitioning to a pale greyish-brown on the flanks. The most distinctive feature is the bright yellow vent (undertail coverts).

2. 2

   Beak shape

   Shape and color of the bill: a key field mark.

   Slender, slightly decurved, and black.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown.

4. 4

   Leg color

   Leg and foot color.

   Dark grey to black.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The bright yellow vent is the most reliable field mark. The white supercilium and white patch below the eye are also distinctive against the dark head.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles resemble adults but have duller plumage, with the yellow vent being less vibrant and the head markings less sharply defined. Their overall coloration may be slightly paler brown.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. Plumage remains consistent throughout the year.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are monomorphic, appearing identical in plumage and size.

Key field marks

• Yellow Vent. Look for the bright, conspicuous yellow undertail coverts. This is the most definitive field mark.
• Head Pattern. Observe the dark brown to blackish head with a clear white supercilium (eyebrow stripe) and a distinct white patch below the eye. These contrast sharply with the dark head.
• Underparts. Note the white throat and breast, transitioning to pale greyish-brown flanks.
• Upperparts. The back, wings, and tail are a uniform dull brown.
• Vocalization. Listen for its cheerful, varied, and often chattering song, or its sharp 'chip-chip-chip' alarm call.
• Behavior. Watch for its active foraging in shrubs and trees, often in open or disturbed habitats.

Explore the Yellow-vented Bulbul