The explanation for the Starling deaths on an Anglesey lane

Apparently the answer is that they were trying to avoid a predator.???      Seems a very unlikely reason for so many to die at the same time.    Another explanation I heard a month or so back was that the low flying aircraft practicing as they do, had caused a similar fall of a number of birds out of the sky.   We will not hear any more about it but I know which sounds more likely to me.