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Giant ibis (Cò quăm lớn, Pseudibis gigantea)

The giant ibis (Pseudibis gigantea) is a wading bird of the ibis family, Threskiornithidae. 
The bird is confined to northern Cambodia, with a few birds surviving in extreme southern Laos and in Yok Đôn National Park, Vietnam.

Pelecaniformes translates to "pelican-shaped" or "pelican-formed," derived from the New Latin Pelecanus (pelican) + -iformes (having the form of). The term originates from the Ancient Greek pelekan (πελεκάν), which is linked to pelekys (πέλεκυς), meaning "axe," likely referencing the large, axe-like bill of the bird.

Threskiornithidae, the scientific family name for ibises and spoonbills, originates from Ancient Greek and New Latin, meaning "religious bird" or "worshipper bird". It is derived from thrēskeia (Greek for "religion" or "worship") and ornis (Greek for "bird"), likely referring to the sacred status of the ibis in ancient Egypt.

Pseudibis is a scientific genus name for a group of Southeast Asian ibises, derived from a combination of Greek and Latin meaning "false ibis". The prefix Pseudo- originates from Greek pseudos, meaning "false" or "lying," and ibis comes from the Latin/Greek term for the bird. 

Gigantea is the feminine Latin adjective meaning gigantic, huge, enormous, or mighty, derived from the Latin giganteus (of or belonging to giants). It originates from the Greek Gígantes (plural of Gígas), referring to the mythical race of great strength. 

Spoonbills are a genus, Platalea, of large, long-legged wading birds. 

Pelecanus: Greek pelekan, pelekanos pelican.

Threskiornis Greek threskeia religious worship (threskeuo to worship); ornis bird. 
The Sacred Ibis Threskiornis aethiopicus was venerated by the ancient Egyptians for its crescent-shaped bill and bright white plumage. They considered it to represent Thoth the moon god.

Platalea: from Ancient Greek and meaning "broad", referring to the shape of the bill.

1/ Black-faced spoonbill (Cò thìa, Platalea minor)
2/ Eurasian spoonbill (Cò thìa Á Âu, Platalea leucorodia), or common spoonbill
leucorodia is from Ancient Greek leukerodios: leukos, "white" and erodios "heron".

Plegadis is a bird genus in the family Threskiornithidae. 

Pelecanus: Greek pelekan, pelekanos pelican.

Threskiornis Greek threskeia religious worship (threskeuo to worship); ornis bird. 
The Sacred Ibis Threskiornis aethiopicus was venerated by the ancient Egyptians for its crescent-shaped bill and bright white plumage. They considered it to represent Thoth the moon god.

The genus name derives from Ancient Greek plegados meaning "sickle", referring to the distinctive shape of the bill.

1/ Glossy ibis (Quắm đen, Plegadis falcinellus)
The scientific name derives from Ancient Greek plegados and Latin, falcis, both meaning "sickle", referring to the distinctive shape of the bill.

The bird genus Pseudibis consists of three South-East Asian species in the ibis subfamily, Threskiornithinae.

1/ Red-naped ibis (Cò quăm cánh xanh or Cò quăm đen Ấn Độ or cò quăm gáy đỏ, Pseudibis papillosa) also known as the Indian black ibis or black ibis
2/ Giant ibis (Cò quăm lớn, Pseudibis gigantea)

Red-naped ibis (Cò quăm cánh xanh or Cò quăm đen Ấn Độ or cò quăm gáy đỏ, Pseudibis papillosa) also known as the Indian black ibis or black ibis

The red-naped ibis (Pseudibis papillosa), also known as the Indian black ibis or black ibis, is a species of ibis found in the plains, agriculture fields and cities of the Indian subcontinent.

Pelecaniformes translates to "pelican-shaped" or "pelican-formed," derived from the New Latin Pelecanus (pelican) + -iformes (having the form of). The term originates from the Ancient Greek pelekan (πελεκάν), which is linked to pelekys (πέλεκυς), meaning "axe," likely referencing the large, axe-like bill of the bird.

Threskiornithidae, the scientific family name for ibises and spoonbills, originates from Ancient Greek and New Latin, meaning "religious bird" or "worshipper bird". It is derived from thrēskeia (Greek for "religion" or "worship") and ornis (Greek for "bird"), likely referring to the sacred status of the ibis in ancient Egypt.

Pseudibis is a scientific genus name for a group of Southeast Asian ibises, derived from a combination of Greek and Latin meaning "false ibis". The prefix Pseudo- originates from Greek pseudos, meaning "false" or "lying," and ibis comes from the Latin/Greek term for the bird. 

Papillosa is a Latin-derived botanical and zoological term meaning "full of nipples," "pimpled," or "covered in small, raised projections" (papillae). It originates from the Latin papilla (nipple or pimple) and the suffix -osa, meaning "full of" or "abundant in".

Threskiornis is a genus of ibises, wading birds of the family Threskiornithidae.

1/ Black-headed ibis (Cò quăm đầu đen, Threskiornis melanocephalus), also known as the Oriental white ibis, Indian white ibis, and black-necked ibis

The family Threskiornithidae, which belongs to the bird order Pelecaniformes, includes 36 species of large wading birds. 

Pelecanus: Greek pelekan, pelekanos pelican.

Threskiornis Greek threskeia religious worship (threskeuo to worship); ornis bird. 
The Sacred Ibis Threskiornis aethiopicus was venerated by the ancient Egyptians for its crescent-shaped bill and bright white plumage. They considered it to represent Thoth the moon god.

White-shouldered ibis (Pseudibis davisoni)

The white-shouldered ibis (Pseudibis davisoni) is a large species of bird in the family Threskiornithidae.
The bird is native to small regions of Southeast Asia, and is one of the most threatened bird species on this part of the continent.
This species once extended throughout Southeast Asia from Myanmar to Thailand, Malaysia, Cambodia, Laos, Vietnam and north into Yuman in China.
The bird re-appeared in Dong Thap Muoi (Mekong Delta, southern Vietnam) in 2019 after decades of absence.

Pelecaniformes translates to "pelican-shaped" or "pelican-formed," derived from the New Latin Pelecanus (pelican) + -iformes (having the form of). The term originates from the Ancient Greek pelekan (πελεκάν), which is linked to pelekys (πέλεκυς), meaning "axe," likely referencing the large, axe-like bill of the bird.

Threskiornithidae, the scientific family name for ibises and spoonbills, originates from Ancient Greek and New Latin, meaning "religious bird" or "worshipper bird". It is derived from thrēskeia (Greek for "religion" or "worship") and ornis (Greek for "bird"), likely referring to the sacred status of the ibis in ancient Egypt.

Pseudibis is a scientific genus name for a group of Southeast Asian ibises, derived from a combination of Greek and Latin meaning "false ibis". The prefix Pseudo- originates from Greek pseudos, meaning "false" or "lying," and ibis comes from the Latin/Greek term for the bird.