Thai National Parks

Species of Thailand

Olive bulbul

Iole viridescens

Edward Blyth, 1845

In Thai: นกปรอดเล็กสีไพลตาแดง

The olive bulbul (Iole viridescens) is a species of songbird in the bulbul family, Pycnonotidae.

It is found from southern Myanmar to south-western Thailand and the Malay Peninsula.

Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests.

Taxonomy and systematics

Formerly, the olive bulbul was classified in the genera Microscelis and Hypsipetes by some authorities. The synonym Hypsipetes virescens has also been used for the Nicobar bulbul and the Sunda bulbul. Alternate names for the olive bulbul include Blyth's olive bulbul, Sumatran bulbul, and viridescent bulbul. The name 'olive bulbul' is also used as an alternate name by the yellow-bearded greenbul and the sulphur-bellied bulbul.


Three subspecies are currently recognized. The Cachar bulbul was also considered as a subspecies of the olive bulbul until it was split off and re-classified as a separate species by the IOC in 2017:

  • I. v. viridescens - Blyth, 1867: Found in southern Myanmar and south-western Thailand
  • I. v. lekhakuni - (Deignan, 1954): Found in southern Myanmar and south-western Thailand
  • I. v. cinnamomeoventris - Baker, ECS, 1917: Found on northern and central Malay Peninsula

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Category / Seasonal Status

BCST Category: Recorded in an apparently wild state within the last 50 years

BCST Seasonal status: Resident or presumed resident

Scientific classification

Iole viridescens

Common names

  • Thai: นกปรอดเล็กสีไพลตาแดง

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Olive bulbul range

Range Map

Distribution map of Olive bulbul, Iole viridescens in Thailand
  • Ao Phang-Nga National Park
  • Chaloem Rattanakosin National Park
  • Erawan National Park
  • Huai Kha Khaeng Wildlife Sanctuary
  • Huai Yang Waterfall National Park
  • Kaeng Krachan National Park
  • Kaeng Krung National Park
  • Khao Banthat Wildlife Sanctuary
  • Khao Laem National Park
  • Khao Lak - Lam Ru National Park
  • Khao Luang National Park
  • Khao Nan National Park
  • Khao Phanom Bencha National Park
  • Khao Phra - Bang Khram Wildlife Sanctuary
  • Khao Phra Thaeo Wildlife Sanctuary
  • Khao Sam Roi Yot National Park
  • Khao Sok National Park
  • Khao Yoi District, Phetchaburi
  • Khlong Lan National Park
  • Khlong Nakha Wildlife Sanctuary
  • Khura Buri District, Phang Nga
  • Kromluang Chumphon Wildlife Sanctuary
  • Kui Buri National Park
  • Mae Moei National Park
  • Mae Sot District, Tak
  • Mae Wong National Park
  • Mueang Chumphon District, Chumphon
  • Mueang Kanchanaburi District, Kanchanaburi
  • Mueang Krabi District, Krabi
  • Ngao Waterfall National Park
  • Phato District, Chumphon
  • Sai Yok National Park
  • San Kala Khiri National Park
  • Sangkhla Buri District, Kanchanaburi
  • Sri Phang-nga National Park
  • Tai Rom Yen National Park
  • Taksin Maharat National Park
  • Takua Pa District, Phang Nga
  • Thong Pha Phum National Park
  • Thung Yai Naresuan Wildlife Sanctuary
  • Ton Nga-Chang Wildlife Sanctuary
  • Umphang Wildlife Sanctuary
  • Wang Mai Forest Restoration Project
Range map of Iole viridescens in Thailand