Birds of Vietnam, Bird Species in Vietnam

Order: Suliformes
Family: Anhingidae
Genus: Anhinga

Oriental darter
(Cổ rắn, Điêng điểng, Anhinga melanogaster)

The Oriental darter (Anhinga melanogaster) is a water bird of tropical South Asia and Southeast Asia.

Suliformes maybe from Old Norse Sula +‎ -iformes for boobies, gannets.
Anhinga is derived from the Tupi ajíŋa (also transcribed áyinga or ayingá), which in local mythology refers to a malevolent demonic forest spirit; it is often translated as "devil bird". The name changed to anhingá or anhangá as it was transferred to the Tupi–Portuguese Língua Geral.
melanogaster, melanogastra, melanogastrus Greek melas black; gaster belly.

Order: Suliformes

The darters, anhingas, or snakebirds are mainly tropical waterbirds in the family Anhingidae, which contains a single genus, Anhinga.

Suliformes maybe from Old Norse Sula +‎ -iformes for boobies, gannets.
Anhinga is derived from the Tupi ajíŋa (also transcribed áyinga or ayingá), which in local mythology refers to a malevolent demonic forest spirit; it is often translated as "devil bird". The name changed to anhingá or anhangá as it was transferred to the Tupi–Portuguese Língua Geral.

Phaethon is the only genus of the family Phaethontidae, Tropicbird Phaethontidae.

1/ Red-billed tropicbird (Chim nhiệt đới, Phaethon aethereus)

Tropicbirds are a family, Phaethontidae, of tropical pelagic seabirds. They are the sole living representatives of the order Phaethontiformes.

A booby is a seabird in the genus Sula, part of the family Sulidae. Boobies are closely related to the gannets (Morus), which were formerly included in Sula.
The English name "booby" was possibly based on the Spanish slang term bobo, meaning "stupid", as these tame birds had a habit of landing on board sailing ships, where they were easily captured and eaten.

1/ Brown booby (Chim điên bụng trắng, Sula leucogaster)
2/ Red-footed booby (Chim điên chân đỏ, Sula sula)
3/ Masked booby (Chim điên mặt xanh, Sula dactylatra), also called the masked gannet or the blue-faced booby

Order: Suliformes

The bird family Sulidae comprises the gannets and boobies. Collectively called sulids, they are medium-large coastal seabirds that plunge-dive for fish and similar prey.

Suliformes maybe from Old Norse Sula +‎ -iformes for boobies, garnets.

Pelicans (genus Pelecanus) are a genus of large water birds that make up the family Pelecanidae with a long beak and a large throat pouch.
The throat pouch is used for catching prey and draining water from the scooped-up contents before swallowing.

1/ Great white pelican (Bồ nông trắng lớn, Pelecanus onocrotalus) also known as the eastern white pelican, rosy pelican or simply white pelican
2/ Spot-billed pelican (Bồ nông chân xám, Pelecanus philippensis) or gray pelican

The Pelecanidae is a family of pelecaniform birds within the Pelecani that contains three genera:
- the extinct Eopelecanus,
- the Miopelecanus,
- and the extant Pelecanus.

The Pelecaniformes are an order of medium-sized and large waterbirds found worldwide.
The pelicans, shoebill and hamerkop form a clade within the order, with their next closest relatives being a clade containing the herons, ibises and spoonbills.

Pelecaniformes
Threskiornithidae – ibises, spoonbills (36 species)
Ardeidae – herons, bitterns (72 species)
Balaenicipitidae – shoebill
Scopidae – hamerkop
Pelecanidae – pelicans (8 species)

Order: Columbiformes
Family: Columbidae

Ducula is a genus of the pigeon family Columbidae, collectively known as imperial pigeons.
Imperial pigeons are found in forests of southern Asia, New Guinea, northern Australia and the Pacific islands.

Columba: Latin columba (“dove, pigeon”). Ancient Greek κόλυμβος (kólumbos, “a diver”), from κολυμβάω (kolumbáō, “dive, plunge headlong, swim”).
The genus name Ducula is from the Latin dux genitive ducis meaning "leader".

1/ Mountain imperial pigeon (Gầm ghì lưng nâu, Ducula badia), also known as the maroon-backed imperial pigeon or Hodgson's imperial pigeon
2/ Green imperial pigeon (Gầm ghì lưng xanh, Ducula aenea)
3/ Pied imperial pigeon (Gầm ghì trắng, Ducula bicolor)

Order: Columbiformes
Family: Columbidae

Macropygia is a genus of bird in the pigeon and dove family Columbidae. The genus is one of three genera known as cuckoo-doves.
Columbidae, Columba: Latin columba (“dove, pigeon”). Ancient Greek κόλυμβος (kólumbos, “a diver”), from κολυμβάω (kolumbáō, “dive, plunge headlong, swim”).
Macropygia: the Ancient Greek makros meaning "long" or "deep" and "-pugios" meaning "-rumped").

1/ Little cuckoo-dove (Gầm ghì đầu hung, Macropygia ruficeps)
2/ Barred cuckoo-dove (Gầm ghì vằn, Macropygia unchall)

Order: Columbiformes
Family: Columbidae

Treron is a genus of bird in the pigeon family Columbidae. Its members are commonly called green pigeons. The genus is distributed across Asia and Africa.

Columbidae, Columba: Latin columba (“dove, pigeon”). Ancient Greek κόλυμβος (kólumbos, “a diver”), from κολυμβάω (kolumbáō, “dive, plunge headlong, swim”).
Pigeon is a French word that derives from the Latin pīpiō, for a "peeping" chick;
Dove is an ultimately Germanic word that refers to the bird's diving flight.
The genus name Treron is from the Ancient Greek trērōn meaning "pigeon" or "dove".

1/ White-bellied green pigeon (Cu xanh Bụng Trắng, Treron sieboldii)
2/ Yellow-footed green pigeon (Cu xanh chân vàng, Treron phoenicopterus), also known as yellow-legged green pigeon
3/ Cinnamon-headed green pigeon (Cu xanh cổ nâu, Treron fulvicollis)
4/ Pink-necked green pigeon (Cu xanh đầu xám, Treron vernans)
5/ Sri Lanka green pigeon or Ceylon green pigeon (Cu xanh đuôi đen, Treron pompadora)
Many authorities split the species from the pompadour green pigeon complex.
6/ Pin-tailed green pigeon ( Cu xanh đuôi nhọn, Treron apicauda)
7/ Orange-breasted green pigeon (Cu xanh khoang cổ, Treron bicinctus)
8/ Thick-billed green pigeon (Cu xanh mỏ quặp, Treron curvirostra)
9/ Wedge-tailed green pigeon or Kokla green pigeon (Cu xanh sáo, Treron sphenurus)
10/ Yellow-vented green pigeon (Cu xanh Seimun, Treron seimundi)