| |

Monarch Butterflies

ByRichard Nissen Reading Time: 1 minute

Here is a link to Monarch Butterflies

http://phys.org/tags/monarch+butterflies/

Editor’s remark

I have difficulty understanding these results which  suggest that Cryptrochromes are involved which I am fairly clear is impossible as there is not enough time for the quantum coherence to take place.

Inclination compasses are very inaccurate as there can be huge changes locally due to magnetic anomalies in the ground.

I still have the problem that knowing where North is, is of no help, if you do not know the bearing of where you are going.  Ie You must  know where your destination is.

I look forward to any feedback on all of this.

I have heard that The Monarchs that set off on these migrations are not the same individuals as end at their destinations – another conundrum!

Richard Nissen
Editor

Similar Posts

Avian Navigation System

The avian navigation system is rather complex, based on many factors, and it even used two aspects of the magnetic field. If, in a given situation, one can show that the receptors in the beak have no effect, that does not mean that they do not have one in another situation! Anaesthesia of the upper…

The hippocampus of rats

Prof Kate Jeffery has done some very interesting work on how the hippocampus of rats processes navigational information. Scientists are clear that the hippocampus is critical for navigation but believe that it is only one part of a larger system that has many functions including recognising landmarks, computing distances and directions etc. and forming memories….

A sense of direction

I hold the view that animals, the ancient peoples and the aborigines navigate perfectly well without compasses.  This we often call a sense of direction.  People with a sense of direction very seldom get lost even on dark nights even in unfamiliar territory. Not everyone has a sense of direction but those who do rely…