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Alophoixus is a genus of songbird in the bulbul family, Pycnonotidae found in south-eastern Asia.

The family name is from Greek: puknos "thick" or "compact" and -nōtos "-backed".

Alophoixus Greek: alophos crestless; genus Ixos: Greek mistletoe;

1/ Ochraceous Bulbul (Cành cạch bụng hung, Alophoixus ochraceus)

2/ Puff-throated bulbul (Cành cạch lớn, Alophoixus pallidus), also  the olivaceous bearded-bulbul, olivaceous bulbul and white-throated bulbul. 
The latter name should not be confused with the species of the same name, Alophoixus flaveolus.
originally in the genus Criniger until moved to the genus Alophoixus in 2009.

Ochraceous Bulbul 
(Cành cạch bụng hung, Alophoixus ochraceus)

The ochraceous bulbul (Alophoixus ochraceus) is a species of songbird in the bulbul family, Pycnonotidae.

Difference between the puff-throated bulbul (Alophoixus pallidus) vs ochraceous bulbul (Alophoixus ochraceus): former is lighter and paler than latter; under body of the former is more yellowish than the latter.

The family name is from Greek: puknos "thick" or "compact" and -nōtos "-backed".
Alophoixus Greek: alophos crestless; genus Ixos: Greek mistletoe;
ochre, Ochraceous: brownish yellow, Latin from ōchra (“ochre”) +‎ -āceus, from Ancient Greek ὠχρός (ōkhrós, “wan”), from ὤχρα (ṓkhra, “yellow ochre”).

Puff-Throated Bulbul, also  the olivaceous bearded-bulbul, olivaceous bulbul and white-throated bulbul. 
(Cành cạch lớn, Alophoixus pallidus)
The latter name should not be confused with the species of the same name, Alophoixus flaveolus.
originally in the genus Criniger until moved to the genus Alophoixus in 2009.

The puff-throated bulbul (Alophoixus pallidus) is a songbird in the bulbul family, Pycnonotidae.

Difference between the puff-throated bulbul (Alophoixus pallidus) vs ochraceous bulbul (Alophoixus ochraceus): former is lighter and paler than latter; under body of the former is more yellowish than the latter.

The family name is from Greek: puknos "thick" or "compact" and -nōtos "-backed".
Alophoixus Greek: alophos crestless; genus Ixos: Greek mistletoe;
pallidus: Latin (“pale yellow-green”).