cyberdad wrote:
autisticelders wrote:
Magnetism of the earth is used by many species to orient for migration.
Slightly off topic but I was watching a flock of waterbirds last month fly up to Mount Hotham in Victoria State in Australia. It was absolutely fascinating that when they reached the summit the flock circled the summit systematically 7-8 times. It was as if they were doing some ritual but I think they must be following an electromagnetic field.
More likely they were just following each other. Like if you were in a shore hugging boat following another boat, but the skipper of the leading boat didnt know that you were off the shore of an island. So both of you just kept circling the island until you both realized "Hey! The scenery keeps repeating...this isnt the mainland. This is just an island".