While I'm far from a professional, I'd rule out emu being known to Anglo-Saxons. As for ostrich, seems far more plausible of the two. Not that ostriches were in

While I'm far from a professional, I'd rule out emu being known to Anglo-Saxons. As for ostrich, seems far more plausible of the two. Not that ostriches were indigenous to any part of Europe, but they were at least known to them through trade. Emu would just be far-fetched, I think.