3-12-2015 JURONG, SINGAPORE - RED WHISKERED BULBUL (Pycnonotus jocosus)

The red-whiskered bulbul (Pycnonotus jocosus), or crested bulbul, is a passerine bird native to Asia. It is a member of the bulbul family. It is a resident frugivore found mainly in tropical Asia. It has been introduced in many tropical areas of the world where populations have established themselves. It has a loud three or four note call, feeds on fruits and small insects and perches conspicuously on trees. It is common in hill forests and urban gardens.

The red-whiskered bulbul was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Lanius jocosus. The specific epithet is from Latin ioculus meaning "merry" (from iocus meaning "joke"). Linnaeus based his description on the Sitta Chinensis that had been described in 1757 by the Swedish naturalist Pehr Osbeck. Linnaeus specified the location as "China" but this was restricted to Hong Kong and Guangdong by Herbert Girton Deignan in 1948. The red-whiskered bulbul is now placed in the genus Pycnonotus that was introduced by the German zoologist Friedrich Boie in 1826.

Hybrids have been noted in captivity with the red-vented, white-eared, white-spectacled, black-capped and Himalayan bulbuls. Leucism has also been recorded.

The red-whiskered bulbul is about 20 centimetres (7.9 in) in length. It has brown upper-parts and whitish underparts with buff flanks and a dark spur running onto the breast at shoulder level. It has a tall pointed black crest, red face patch and thin black moustachial line. The tail is long and brown with white terminal feather tips, but the vent area is red. Juveniles lack the red patch behind the eye, and the vent area is rufous-orange.

The loud and evocative call is a sharp kink-a-joo (also transcribed as pettigrew or kick-pettigrew or pleased to meet you and the song is a scolding chatter. They are more often heard than seen, but will often perch conspicuously especially in the mornings when they call from the tops of trees. The life span is about 11 years.

This is a bird of lightly wooded areas, more open country with bushes and shrubs, and farmland. Irruptions have been noted from early times with Thomas C. Jerdon noting that they were "periodically visiting Madras and other wooded towns in large flocks."

It has established itself in Australia and in Los Angeles, Hawaii, and Florida in the United States, as well as in Mauritius, on Assumption Island and Mascarene Islands. In Florida, it is only found in a small area, and its population could be extirpated easily. It was eradicated from Assumption Island in 2013–2015 to prevent colonisation of nearby Aldabra, the largest introduced bird-free tropical island.

The red-whiskered bulbul was introduced by the Zoological and Acclimatization Society in 1880 to Sydney, became well established across the suburbs by 1920, and continued to spread slowly to around 100 km away. It is now also found in suburban Melbourne and Adelaide, although it is unclear how they got there.

On the island of Réunion, this species established itself and also aided the spread of alien plant species such as Rubus alceifolius. In Florida they feed on fruits and berries of as many as 24 exotic plants including loquat (Eriobotrya japonica), Lantana spp., Brazilian pepper (Schinus terebinthifolius) and figs (Ficus). In Mauritius they aid the dispersal of Ligustrum robustum and Clidemia hirta. Seeds that pass through their gut germinate better. Populations of the red-whiskered bulbul on the island of Réunion have diversified in the course of thirty years and show visible variations in bill morphology according to the food resources that they have adapted to utilize.

The red-whiskered bulbul feeds on fruits (including those of the yellow oleander that are toxic to mammals), nectar and insects.