The Sunda Bulbul or Green-winged Bulbul (Ixos virescens) is a songbird

Songbird

A songbird is a bird belonging to the suborder Passeri of the perching birds . Another name that is sometimes seen as scientific or vernacular name is Oscines, from Latin oscen, "a songbird"...

 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 in the bulbul

Bulbul

Bulbuls are a family, Pycnonotidae, of medium-sized passerine songbirds. Many forest species are known as greenbuls. The family is distributed across most of Africa and into the Middle East, tropical Asia to Indonesia, and north as far as Japan. A few insular species occur on the tropical islands...

 family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 (Pycnonotidae). It is the type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

 of the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Ixos

Ixos

Ixos is a songbird genus in the bulbul family, Pycnonotidae. It provisionally contains the following species:* Yellowish Bulbul, Ixos everetti* Streaked Bulbul, Ixos malaccensis...

.

Its genus is sometimes merged into Hypsipetes

Hypsipetes

Hypsipetes is a genus of bulbuls, songbirds in the family Pycnonotidae. Most of its species birds occur in tropical forests around the Indian Ocean. But while the genus is quite diverse in the Madagascar region at the western end of its range it does not reach the African mainland.Most Hypsipetes...

, presumably based on an error in the Sibley taxonomy which keeps them separate but includes I. virescens in Hypsipetes. But actually, Hypsipetes would to be sumsumed within Ixos of anything, as the latter name was established earlier. Either way, the specific epithet virescens, given to the present species by Coenraad Jacob Temminck

Coenraad Jacob Temminck

Coenraad Jacob Temminck was a Dutch aristocrat and zoologist.Temminck was the first director of the National Natural History Museum at Leiden from 1820 until his death. His Manuel d'ornithologie, ou Tableau systematique des oiseaux qui se trouvent en Europe was the standard work on European birds...

 in 1825, pre-dates the same name as given to the Nicobar Bulbul

Nicobar Bulbul

Found only on the Nicobar Islands of India, the Nicobar Bulbul is a songbird species in the bulbul family . Its scientific name is Hypsipetes virescens as long as Ixos is recognized as a distinct genus....

 by Edward Blyth

Edward Blyth

Edward Blyth was an English zoologist and pharmacist. He was one of the founders of zoology in India....

 in 1845, and thus the latter species is sometimes referred to as H. nicobarensis (though correctly it would be Ixos nicobariensis). In even more extreme treatments, Iole

Iole (genus)

Iole is a genus of bulbuls, songbirds in the family Pycnonotidae. They are native to tropical eastern Asia, from India to China and south through Southeast Asia to northern Indonesia.It includes the following species:* Olive Bulbul, Iole virescens...

is also wrongly subsumed within Hypsipetes, and even if the correct merger of Iole into Ixos is performed the Olive Bulbul

Olive Bulbul

The Olive Bulbul is a species of songbird in the Pycnonotidae family.It is found in Bangladesh, India, Burma, and Thailand....

 (Iole virescens) also requires a new species name, as its was established by Blyth in 1845.

It is endemic to Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

 where it occurs on Sumatra

Sumatra

Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 and Java

Java

Java is an island of Indonesia. With a population of 135 million , it is the world's most populous island, and one of the most densely populated regions in the world. It is home to 60% of Indonesia's population. The Indonesian capital city, Jakarta, is in west Java...

, where its natural habitat

Habitat

* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

 is subtropical or tropical moist montane forests. It is not considered a threatened species

Threatened species

Threatened species are any speciesg animals, plants, fungi, etc.) which are vulnerable to endangerment in the near future.The World Conservation Union is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories,...

 by the IUCN.