Mountain Bulbul or Red-Vented Bulbul?

Here's how to tell the difference

Mountain Bulbul image 1

Mountain Bulbul

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Red-Vented Bulbul image 1

Red-Vented Bulbul

Mountain Bulbul

Ixos mcclellandii

Also known as: Green-Winged Bulbul, McClelland's Bulbul, McClelland's Rufous-Bellied Bulbul, Mountain Streaked Bulbul, Rufous-Bellied Bulbul

General appearance

Mountain bulbuls are medium-sized birds averaging 20 cm in length. They possess distinct black and olive feathers, with their underparts a light yellow and white chin. The bird has a sturdy, hefty beak that is black, and their feet are also black. They have a distinct characteristic square-ended tail with white tips.

Male vs female

There is little sexual dimorphism in the Mountain Bulbul species, which means males and females have similar appearances. Both sexes have the same coloration and size, making it difficult to differentiate between genders based on physical traits alone. Any distinction usually occurs in subtle behavioral differences.

Juvenile

Juvenile Mountain Bulbuls have the same basic coloration as adults, but their feathers may appear duller compared to adult bulbuls. The lighter underparts of juveniles can often be a streaked brown compared to the strong yellow in adults. Juveniles also possess a lesser-developed white tip at the end of the tail, which becomes more prominent as they mature.

Size

8.3 - 9.4 in/1.0 - 1.4 oz

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How to tell the Mountain Bulbul from the Red-Vented Bulbul

Visual differences

The Mountain Bulbul is larger, measuring 8.3-9.4 in, with black and olive plumage, a square-ended tail with white tips, and a black beak and feet. It has light yellow underparts and a white chin. The Red-Vented Bulbul is slightly smaller at 7.9-9.1 in, featuring a short crest, predominantly black body with a distinct red vent, white belly, and dark brown mixed into its plumage. Both species lack significant sexual dimorphism.

Key differences and behavior

The Mountain Bulbul, inhabiting Asian montane forests at 8-30 feet, is more reclusive yet becomes chatty in flocks during feeding; contrastingly, the Red-Vented Bulbul thrives in diverse habitats from South Asia to urban parks globally. The Mountain Bulbul forages high in canopies, consuming fruits and insects, while the adaptive Red-Vented Bulbul feeds on fruits, nectar, and insects, even in gardens. For breeding, Mountain Bulbuls show plumage displays, and both sexes share incubation and feeding duties. Red-Vented Bulbuls enhance pair bonds through food offerings, nesting in low foliage, with both parents feeding the young. Both are social, but Red-Vented Bulbuls, with their adaptability and near-human defiance, have invasive tendencies, unlike the more habitat-specific Mountain Bulbul.

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