White-Spectacled Bulbul vs Red-Vented Bulbul

White-Spectacled Bulbul

Pycnonotus xanthopygos

How to recognise a white-spectacled bulbul?

General appearance

The white-spectacled bulbul, also known as the yellow-vented bulbul, has a sleek body, average length of 20 centimeters and a wingspan between 20-25 centimeters. It has a black crest, a white spectacled ring around its eyes, and a black stripe across its white cheeks. Its body is mainly greyish-brown with a yellow vent under the tail, thus deriving its other common name. Seasonal changes do not significantly affect its appearance.

Male vs female

Both the males and females of this species exhibit similar physical traits and colorations, making it challenging to distinguish between them based purely on visual characteristics. Their differences mainly exist in their vocalizations, with males having a wider variety of calls for attracting mates.

Juvenile

Juvenile white-spectacled bulbuls lack the pronounced specs and crest of the adults, and have a duller, more uniform brown coloration. The spectalces and crest develop progressively with growth. Therefore, if you spot a bulbul without distinct spectacles, it's likely a juvenile.

Size

7.9 - 9.8 in/1.1 - 1.6 oz

Habitat

Primary habitat

The white-spectacled bulbul primarily lives in savannas, gardens, and farmlands of the Middle East and North Africa.

Additional range

In addition to these common habitats, it also occasionally occupies semi-arid areas and coastal scrubs, indicative of its adaptation to diverse climatic conditions.

Range Map

What do white-spectacled bulbuls like to eat?

Natural diet

The white-spectacled bulbul primarily feeds on a variety of fruits, including berries and figs. It also consumes nectar, which it obtains from flowering plants. Apart from fruits, its diet includes insects and small invertebrates, providing essential proteins.

Bird feeders

At bird feeders, the white-spectacled bulbul often eats a range of seeds and fruits provided by enthusiasts. Common offerings include chopped apples, grapes, and pears. Occasionally, it may also consume suet or seed-based mixes, especially those containing sunflower seeds.

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Red-Vented Bulbul

Pycnonotus cafer

How to recognise a red-vented bulbul?

General appearance

The Red-vented Bulbul is a member of the bulbul family of passerines. It is easily identified by its short crest on the head and a characteristic red colour patch on the vent. They are generally around 20cm in length. Their body is primarily black with dark brown mixed in. The head, throat, and crests are black, while the middle of the belly is white.

Male vs female

Males and females appear largely similar with little sexual dimorphism. Both genders flaunt the white belly and red vent patches. Females are slightly smaller and duller than males. It is challenging to distinguish them based on appearance alone.

Juvenile

Juvenile Red-vented bulbuls resemble adults but have less distinctly colored vent patches. Their upper parts are brownish while the belly and under tail coverts are often tinged rust-brown. The head, crest, and throat are not as starkly black, but instead exhibit a mix of browns. Juveniles attain the mature plumage in about one year.

Size

7.9 - 9.1 in/1.1 - 2.1 oz

Habitat

Primary habitat

The red-vented bulbul primarily resides in South Asia and Southeast Asia. It prefers warm, tropical climates, living in light forests, scrublands, and cultivated regions.

Additional range

Surprisingly, this bird has also been spotted in places outside its normal range such as Hawaii, Florida, and New Zealand, where it adapts to urban gardens and parks.

Range Map

What do red-vented bulbuls like to eat?

Natural diet

The red-vented bulbul's natural diet mainly consists of fruits, nectar, and insects. They forage in bushes and trees to consume a wide variety of berries such as figs and lantana. Nectar from flowers like hibiscus is also a significant part of their diet. Insects such as caterpillars, beetles, and ants are consumed, providing essential protein. This diverse diet helps the red-vented bulbul adapt to various environments, ensuring their survival in urban and rural landscapes.

Bird feeders

At bird feeders, red-vented bulbuls are attracted to fruits and seeds. They often consume cut-up bananas, papayas, and apples, as well as commercially available birdseed mixes that include millet and sunflower seeds. Offering sugar water can mimic the nectar they generally obtain from flowers, attracting these birds. While their presence at bird feeders can vary based on availability of natural food sources, they readily adapt to these supplemental feeding options, especially in urban areas.

What does a red-vented bulbul sound like?

The red-vented bulbul is known for its melodic, rich, and bubbly whistle-like vocalizations. Its songs are sweet and expressive, often featuring a variety of notes and trills. The typical call occurs in sequences; a three-part "chuck-churrrr-ip" sound, while its alarm or distress calls are harsh, screechy, and abrupt. It also mimics calls of other bird species. Males use songs primarily to attract females and deter rivals, especially during breeding season.

Call

Audio by Gypsypkd

Song

Audio by Sudipto Roy

/ CC BY-SA 3.0

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White-Spectacled Bulbul

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Red-Vented Bulbul

White-Spectacled Bulbul

Pycnonotus xanthopygos

General appearance

The white-spectacled bulbul, also known as the yellow-vented bulbul, has a sleek body, average length of 20 centimeters and a wingspan between 20-25 centimeters. It has a black crest, a white spectacled ring around its eyes, and a black stripe across its white cheeks. Its body is mainly greyish-brown with a yellow vent under the tail, thus deriving its other common name. Seasonal changes do not significantly affect its appearance.

Male vs female

Both the males and females of this species exhibit similar physical traits and colorations, making it challenging to distinguish between them based purely on visual characteristics. Their differences mainly exist in their vocalizations, with males having a wider variety of calls for attracting mates.

Juvenile

Juvenile white-spectacled bulbuls lack the pronounced specs and crest of the adults, and have a duller, more uniform brown coloration. The spectalces and crest develop progressively with growth. Therefore, if you spot a bulbul without distinct spectacles, it's likely a juvenile.

Size

7.9 - 9.8 in/1.1 - 1.6 oz

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Red-Vented Bulbul

Pycnonotus cafer

General appearance

The Red-vented Bulbul is a member of the bulbul family of passerines. It is easily identified by its short crest on the head and a characteristic red colour patch on the vent. They are generally around 20cm in length. Their body is primarily black with dark brown mixed in. The head, throat, and crests are black, while the middle of the belly is white.

Male vs female

Males and females appear largely similar with little sexual dimorphism. Both genders flaunt the white belly and red vent patches. Females are slightly smaller and duller than males. It is challenging to distinguish them based on appearance alone.

Juvenile

Juvenile Red-vented bulbuls resemble adults but have less distinctly colored vent patches. Their upper parts are brownish while the belly and under tail coverts are often tinged rust-brown. The head, crest, and throat are not as starkly black, but instead exhibit a mix of browns. Juveniles attain the mature plumage in about one year.

Size

7.9 - 9.1 in/1.1 - 2.1 oz

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How to tell the White-Spectacled Bulbul from the Red-Vented Bulbul

Visual differences

The White-Spectacled Bulbul measures about 7.9-9.8 inches in length and features a distinctive white eyering, black crest, and yellow vent against a grayish-brown body. In contrast, the Red-Vented Bulbul is around 7.9-9 inches, sporting a black head, throat, and crest with a red vent and dark body. Its belly is notably white. Both species have similar sizes, but the eye ring and overall coloration serve as key differentiators.

Key differences and behavior

The White-Spectacled Bulbul and Red-Vented Bulbul display several key behavioral differences. Both species are sociable, yet White-Spectacled Bulbuls often pair with siblings, unlike the Red-Vented, which forms pairs during courtship with elaborate displays, including food offerings. In habitat preference, White-Spectacled Bulbuls inhabit savannas and farmlands in the Middle East and North Africa, while Red-Vented Bulbuls thrive in tropical South and Southeast Asia and adapt well to urban areas globally. Diets overlap with both consuming fruits, nectar, and insects, but Red-Vented Bulbuls are notably adaptable, even at feeders, due to their invasive tendencies. Both species nest in low trees or shrubs, but White-Spectacled Bulbuls emphasize privacy in gardens, and Red-Vented embrace proximity to humans. These behavioral traits can assist birdwatchers in distinguishing the two species in the field.