Are cicadas toxic to birds? Just askin.
No. In General. But this time it may be different. Seems the most likely reason.
But then again, we just had to deal with a man made virus so who knows what is going on.
I have seen exactly one cicada and heard none.
Last time around, the cicada bloom led to a temporary population boost to the animals that eat them. This time could the cicadas have accumulated toxins or an infectious vector over their dormancy?