Journal: Hogwarts Filter
So I got a message from a Scandinavian magizoologist. He has a friend who's a history and has sent me information about these birds. The caveat is that since there are no pictures or direct accounts, they can't be 100% sure it is the same birds.
I've attached everything they know about them. Apparently they were very common in North Europe until about the twelfth century when wizards started to eradicate them because they put too much of a strain on the Muggle population. Anyway, everything they know about them is enclosed. I hope this helps both with the research and the antidote.