I can see that a lot of people are trying to solve it, so far.
What's strange is how it's affecting some birds more than others. That reminds me of how West Nile works, though this isn't that disease.
I pray that the cause be found soon, and that once it's understood what the cause is, that something can be done to prevent more bird deaths.
I also pray that it won't turn out to be communicable to humans at some point, pet birds, or barnyard birds such as chickens.
Thank you for sharing this with us.
Love All Life; Thank You For Posting! :)