I am quite suspicious about all this. It seems too much of a coincidence that all these are happening all over the world at the same time. Last year, there was speculation that Swine Flu had been a man made disease set to wipe out the World's population. Now this year, we have lots of birds and fish dying all over the World.

I wonder what it will be next year (assuming we will all still be here!)?
The common factor between birds and fish would be water I suppose, so it could be due to polluted waters, but it seems very strange that all the water in the World suddenly affect all the fish and birds at the same time.
From the map I see there are none in Africa. I do not understand why birds would just fall from the sky (and all together). If they felt ill, they would usually sit around looking puffy for a few days and then wander off somewhere to die and you wouldn't really expect them all to die together.
The fact they just all fell from the sky could I suppose mean that they hit something or something made them disorientated or dizzy or could be lack of oxygen. Actually lack of oxygen could apply to fish also, so that's a bit worrying if it is due to lack of oxygen.
The Italian one says that the birds beaks were tinged blue, meaning poisoning or lack of oxygen. It sounds like some sort of evil mass poisoning to me, but then I am probably being too suspicious and it is all just a co-incidence, but it has made me intrigued all the same!
I hate unsolved mysteries. I always want to try to solve them - probably connected to my love of Maths (I would stay up all night if need be, to solve Maths problems when I was doing A levels, only to get to school the next day and find that nobody else could do it and they all ended up copying mine!).