info on zebra finches and if they can live alone

Zebra finches really do best in pairs or groups and should not be left to live alone. That's actually why I adopted one of my finches from the humane society. I saw he was there as a single and couldn't bear the thought of someone adopting him only to keep him alone for the rest of his life. At the time I had 5 others to be with.

Unlikely... a widowed hen may be able to rear a nest of chicks on her own, but as well as the strain on her own well being, she will have competition from other birds for the nesting material. My Zebra finches are rascals for robbing nesting material, including plucking feathers from other birds in the aviary.

Zebra finches mate for life and do not do well living alone,

I have finches - both Zebra and Gouldian. We have had one female die. We immediately replaced her so the male would not be alone. I can't say for sure that the lone bird would die - but finches are social birds and like to have company.