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.