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Lonchura is a genus of the estrildid finch family (Estrildidae), and includes munias (or minias) and mannikins who are seed-eating.
The name mannikin is from Middle Dutch mannekijn 'little man'.
Lonchura the Ancient Greek lonkhē meaning "spear-head" or "lance" with oura meaning "tail".
 
1/ White-rumped munia (Lonchura striata) or white-rumped mannikin, sometimes called striated finch (Di cam, Lonchura striata)
2/ Scaly-breasted munia or spotted munia, known in the pet trade as nutmeg mannikin or spice finch (Di đá, Lonchura punctulata)
3/ Tricoloured munia (Di đầu đen, Lonchura malacca)

Scaly-breasted munia 
or spotted munia, known in the pet trade as nutmeg mannikin or spice finch 
(Di đá, Lonchura punctulata)

The scaly-breasted munia or spotted munia (Lonchura punctulata), known in the pet trade as nutmeg mannikin or spice finch, is a sparrow-sized estrildid finch native to tropical Asia. 
The bird occurs from India and Sri Lanka east to Indonesia and the Philippines

The name mannikin is from Middle Dutch mannekijn 'little man'.
Lonchura the Ancient Greek lonkhē meaning "spear-head" or "lance" with oura meaning "tail".
punctulata: Latin punctulatus spotted, dotted.

Tricoloured munia 
(Di đầu đen, Lonchura malacca)

The tricoloured munia (Lonchura malacca) is an estrildid finch, native to Bangladesh, India, Sri Lanka, Pakistan, and southern China.

The name mannikin is from Middle Dutch mannekijn 'little man'.
Lonchura the Ancient Greek lonkhē meaning "spear-head" or "lance" with oura meaning "tail".

White-rumped munia  
or white-rumped mannikin, sometimes called striated finch 
(Di cam, Lonchura striata)

The white-rumped munia (Lonchura striata) or white-rumped mannikin, sometimes called striated finch in aviculture, is a small passerine bird from the family of waxbill "finches" (Estrildidae). 

The bird is native to tropical continental Asia and some adjacent islands.

The name mannikin is from Middle Dutch mannekijn 'little man'.
Lonchura the Ancient Greek lonkhē meaning "spear-head" or "lance" with oura meaning "tail".
striata: Latin striated.