There was a shift in the magnetic field of the earth caused by solar flares and solar winds on the two nights. Every so often the sun angle is turned to us where the solar winds in the sun causes this effected. Usually it there is no effects of this to us, but about ten years it was documented that there might have been a small temporary shift in the magnetic poles.
No one is writing about this happening last December, but there is documentation of it happening in the past. And we have documentation that there was solar flares/solar winds on these nights. So adding the two together, apparently there that it happened.
I do not know why NASA and other will not write about this and disclose it?
So you can see if the birds and fish lost their sense of direction they could be confused and fly until they dropped in exhaustation.