Gray-headed Bulbul
Microtarsus priocephalus
Perpetually surprised-looking bulbul. Predominantly olive-yellow with a gray head, yellow forehead, and silvery rump and tail. Look for this species in wet forest and forest edge in lowland and foothill areas; gleans food from all levels of forest. Most common call is a loud buzzy “dzzzz!”
Identification
This bulbul is resident in moist broad-leaved evergreen forest with bamboo and dense undergrowth. Its plumage is olive-green, with a medium-grey on the crown head, nape and throat. The forehead is yellow-green. The back and wings are olive-green becoming lighter towards the vent. The rump has yellowing green feathers edged in black giving a barred appearance. The flanks are dark and grey edged. The undertail coverts are grey. The beak is greenish and grey while the legs are pinkish yellow. The iris is distinctly bluish white. The tail is grey on the central feathers (the shaft being black), the outer ones are black and are broadly tipped with grey. Both sexes are similar but juveniles have the head dark olive with the yellow on the forehead duller. (Length 143-152mm; head 33-35mm; tail 74-77mm) The call is a sharp chraink. The call is distinct in having a single syllable unlike those of the core genus Pycnonotus members.
Taxonomy
The grey-headed bulbul was originally described by Thomas Jerdon under the name of Brachypus priocephalus. It was moved to Brachypodius poiocephalus by Edward Blyth, who erroneously "emended" the species epithet, with subsequent confusion in the literature. Formerly, some authorities placed this species within the genus Ixos and later Pycnonotus.<p>The genus Pycnonotus was found to be polyphyletic in recent molecular phylogeny studies and the species returned to Brachypodius.<p>The common name 'grey-headed bulbul' is also used as an alternate name for the yellow-bellied bulbul.
- Scientific name
- Microtarsus priocephalus
- Authority
- (Jerdon, 1839)
- Order
- Passeriformes
- Family
- Campephagidae
- Genus
- Microtarsus
Range and habitat
- Migration
- Resident species
Behavior
Found singly or in small groups, grey-headed bulbuls actively join mixed-species foraging flocks during the non-breeding season. <p>Grey-headed bulbuls breed from January to June with a peak in April. The nest is a typical platform placed inside a low bush. They build their nest over a period of a week using vines, grasses or leaves. Many nests in a study in the Silent Valley National park were found to be made on saplings of Syzygium species or in reeds of Ochlandra travancorica. The typical clutch is one egg or sometimes two eggs that are incubated for 12 to 14 days. Eggs are sometimes destroyed and eaten by palm squirrels (Funambulus tristriatus). The eggs are pale pink to lavender and flecked in red, more densely on the broad end. Both parents take part in incubation and feeding. The nestlings leave the nest after 11 to 13 days.<p>The diet consists mainly of fruits (>65%) and invertebrates (>30%). Fruits include those of Symplocos cochinchinensis, Antidesma menasu, Clerodendrum viscosum, Syzygium cumini, Litsea floribunda, Maesa indica, Callicarpa tomentosa, Leea indica and Lantana camara.
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
Other Birds
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