Vietnam Birding

The birds in Vietnam with reddish-brown underparts could be:

1/ Chestnut-bellied rock thrush (Monticola rufiventris)
Male

The birds in Vietnam with ruby-colored triangle on the throat could be:

1/ Siberian rubythroat (Calliope calliope)
Male

The birds in Vietnam with rufous eyebrows could be:

1/ Rufous-browed flycatcher (Anthipes solitaris)

What is the name of the bird in Vietnam with spangles on the body:

1/ Blue whistling thrush (Myophonus caeruleus) 

The birds in Vietnam with vertical stripes on the underparts could be:

1/ Yellow-vented flowerpecker (Pachyglossa chrysorrhea) 
2/ Grey-crowned crocias (Laniellus langbianis) 

The birds in Vietnam with white eyebrows could be:

1/ White-browed bush robin (Tarsiger indicus)
Oanh đuôi nhọn mày trắng

2/ Snowy-browed flycatcher (Ficedula hyperythra)
Đớp ruồi mày trắng

3/ Mugimaki flycatcher (Ficedula mugimaki)

4/ Rufous-gorgeted flycatcher (Ficedula strophiata)

5/ Little pied flycatcher (Ficedula westermanni)

6/ Scimitar-babbler

The birds in Vietnam with a white triangle on the throat could be:

1/ White-gorgeted flycatcher (Anthipes monileger)

The difference between the Abbott's Babbler and the Buff-breasted Babbler:

1/ Abbott's Babbler: grey face, grey-brown colors, grey lore

2/ Buff-breasted Babbler: brown face, brighter brown, brown lore.

The difference between the Asian Barred Owlet and the Collared Owlet:

1/ Asian barred owlet (Glaucidium cuculoides), also known as the cuckoo owlet
- Head: barred;

2/ The collared owlet (Taenioptynx brodiei), also known as the collared pygmy owl
- Head: spotted

The difference between the Black-backed Dwarf-Kingfisher and the Ruddy Kingfisher:

1/ Black-backed Dwarf-Kingfisher: black and blue back, very short tail, white ears

2/ Ruddy Kingfisher: ruddy back

The difference between Pale Blue, Blue-and-White, Hainan Flycatchers in Vietnam:

1/ Pale Blue Flycatcher
Cyornis unicolor
The male have light blue upper parts and very light blue and white lower parts.
The female have gray-brown colors, lack of warm coloration.

2/ Blue-and-white Flycatcher
Cyanoptila cyanomelana

The male have black face, black throat, black breast, royal blue upperparts.
The female have brown upperparts.

3/ Hainan Blue Flycatcher
Cyornis hainanus
The male have sapphire-blue upperparts, and sapphire-blue face. Some are with sapphire-blue throat or white throat or orange throat. Some are with black wings.
The female have orange breast and brown with warm tint uppperparts

The Square-tailed Drongo-Cuckoo is a cuckoo but it looks similar to many drongo species. These birds are mostly distinguished by the areas with glossy hair and those with velvet (without gloss) hair: the face, the head, the hood. In forests with thick canopy lacking light and quick sighting, this is often quite tricky.

How to differenciate the Black Drongo and the Bronzed Drongo in nature in Vietnam:

1/ Black Drongo: consistent black color, slightly bigger in size

2/ Bronzed Drongo: there is an area from the cape to the wings with black sheen, glossiness; the face is black surrounded by black glossiness.

Vietnam possesses an amazing avifauna that is surprising to quite a few birding enthusiasts and ornithologists. The country has diverse terrain and has the territory stretching in different climatic zones which helps to make the favorable habitats for different bird species. 

The birds in Vietnam without tail (or with tail too short to be seen) could be:

1/ Pygmy cupwing (Pnoepyga pusilla) or pygmy wren-babbler

2/ Grey-bellied tesia (Tesia cyaniventer)

What is that scaly bird in Vietnam?

1/ Rock thrushes (Monticola)
Female)

2/ Scaly thrush, White's thrush...  (Zoothera)

3/ Green-legged partridge (Tropicoperdix chloropus), also known as the scaly-breasted partridge or green-legged hill-partridge

The yellow-vented birds in Vietnam could be:

1/ Yellow-vented green pigeon (Treron seimundi), 
also known as Seimunds's Pintail Pigeon

2/ Yellow-vented bulbul (Pycnonotus goiavier), 
or eastern yellow-vented bulbul,

3/ Yellow-vented warbler (Phylloscopus cantator) 

4/ Yellow-vented flowerpecker (Pachyglossa chrysorrhea)

5/ Sooty-headed bulbul (Pycnonotus aurigaster)
Only some individuals have a yellow vent, some have red vent.

6/ Brown-breasted bulbul (Pycnonotus xanthorrhous)

What is difference between the Laced Woodpecker, Grey-headed Woodpecker in Vietnam?

These two woodpeckers are quite similar: gray face, black cap, red front...But the key differences are

1/ Laced Woodpecker (Gecinulus grantia)
Streaked belly.
If having red, then the red covers: front, cap, nape.
Stripes on the edge of the wing are horizontal compared to the body.

2/ Grey-headed Woodpecker (Micropternus brachyurus)
Gray, or whitish or yellowish belly.
If having red color, then the red only covers the front.
Stripes on the edge of the wing are vertical compared to the body.

What is difference between the Pale-headed Woodpecker, Rufous Woodpecker, Bay Woodpecker in Vietnam?

1/ Pale-headed Woodpecker (Gecinulus grantia)
Some with reddish front, the others with light olive-green head, rufous (reddish) wings.

2/ Rufous Woodpecker (Micropternus brachyurus)
Consistent color: either stripes of dark brown and black or rufous (reddish) and black

3/ Bay Woodpecker(Blythipicus pyrrhotis) 
Gray head or light rufous head,

Some with red color on the lower nape,

Dark (and striped) mantle,
Rufous, reddish (and striped with dark color) wings,