Hi, I'm not sure, but it could be youngs of the Chestnut-breasted Munia (Braunbrust-Schilffink)
not that.it's an uncommon Lonchura but easy to reproduce for me :p
an other photo (from Rox)still no idea ?
Oh. now I know! it is a Lonchura nevermanni. A wonderful bird from New Guinea. I had them for 5-6 years ago, and at that time I had bin well breeding with them.Thanks Aurelien
got 20 young in 4 months with 3 pairs xD. they do better as my bengalee