The proposal is that RPM gives rise to chemical compass making possible avian navigation. There is however a problem. RPM has been observed in laboratory only for magnetic fields in the range 1 mT- 10 T. Earth's magnetic field is only 2 per cent of the lower bound so that it is quite possible that RPM is not at work.
This opens up the door for new quantum physics proposed by TGD based model of quantum biology. In this approach magnetic body acts as as intentional agent using biological body as a sensory receptor and motor instrument. Macroscopic quantum coherence is made possible by dark matter realized as a hierarchy of heff=n× h phases.
In the article Can quantum biology really do without new physics? RMP is summarized and compared with the TGD based vision. Also the possible connection between avian navigation and circadian clock suggested by the fact that both involve photoreceptor known as cryptocrome and a possible connection with gravitaxis are considered in TGD framework.
See also the new chapter Can quantum biology really do without new physics? of "TGD based view about living matter and remote mental interactions".
For a summary of earlier postings see Latest progress in TGD.