Greg Martin wrote:Super fascinating Jocelyn. "European robins have increased Cry4 expression during the migratory season, compared to non-migratory chickens" really is amazing. There's always so, so much for us to understand. I wonder if the slight shifts in season magnetic flux is a cue?
Glad you enjoyed it!
I was trying to find a way to reply or find out about magnetic changes in the seasons, and I am way out of my league.
This Wikipedia page on bird migration included quite a bit about birds using magnetic fields for their migrations. It was more general of course, though it followed a lot of what was in the Science Alert article linked at top.
Then, I tried to find a quick summary of what happens to the Earth's magnetic fields with the seasons, but I only found a vague reference to it in this:
The Earth's Magnetic Field: An Overview by the British Geological Survey which included this image of the earth's magnetic field:
Maybe someone else has a better reference for the magnetic changes with the seasons.