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)
The birds in Vietnam with vertical stripes on the underparts could be:
1/ Yellow-vented flowerpecker (Pachyglossa chrysorrhea)
2/ Grey-crowned crocias (Laniellus langbianis)
3/ White-throated Wren-Babbler (Napothera pasquieri)
The birds in Vietnam with horizontal stripes on the underparts could be:
1/ Vietnamese Cutia
(Khướu hông đỏ Việt Nam, Cutia legalleni)
2/ Bar-bellied pitta (Hydrornis elliotii)
3/ Several bird species of the cuckoo family Cuculidae
4/ Some species of the cuckooshrike family Campephagidae
5/ Slaty-legged Crake
Rallina eurizonoides
6/ Red-legged Crake
Rallina fasciata
The birds in Vietnam with brown upperparts could be:
1/ Gould's shortwing (Heteroxenicus stellatus)
2/ Blyth's paradise flycatcher (Terpsiphone affinis), also called the oriental paradise flycatcher
3/ Amur paradise flycatcher (Terpsiphone incei)
4/ Black paradise flycatcher (Terpsiphone atrocaudata), also known as the Japanese paradise flycatcher
The birds in Vietnam with reddish-brown underparts could be:
1/ Chestnut-bellied rock thrush (Monticola rufiventris)
Male
2/ Burmese nuthatch (Sitta neglecta), also known as the neglected nuthatch
3/ Oriental hobby (Falco severus)
The birds in Vietnam with dark blue upperparts could be:
1/ Chestnut-bellied rock thrush (Monticola rufiventris)
Male
If we consider the hood of a bird including the head, the neck and throat, then what is the name of the bird in Vietnam with ashy hood?
1/ Ashy-throated warbler (Phylloscopus maculipennis)
Both these two birds have green the hood possessing blue, red and black colors.
The difference between Blue-throated Barbet and Blue-eared Barbet in Vietnam:
Both these two birds have green the hood possessing blue, red and black colors.
The difference between Blue-throated Barbet and Blue-eared Barbet in Vietnam:
Both these two birds have green the hood possessing blue, red and black colors.
The difference between Blue-throated Barbet and Blue-eared Barbet in Vietnam:
The difference between the Ochraceous Bulbul and the Puff-throated Bulbul:
1/ Ochraceous Bulbul
Plumage: Brownish-olive upperparts and duller, less yellowish underparts.
2/ Puff-throated Bulbul
Plumage: Olive upperparts with contrasting paler, more yellowish underparts.
The difference between the Scarlet Minivet and the other colorful minivets in Vietnam:
1/ Scarlet Minivet:
Wings are blotched with the bright color (either red or yellow which is disjunct from the black or grey color).
Female has the front yellow.
2/ Other Minivets
The bright color is not blotched, but adjunct or connected