[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Homing Pigeons? Try Homing Crocodiles...



Guy Leahy writes:


http://news.bbc.co.uk/2/hi/asia-pacific/7015561.stm


Using phylogenetic bracketing, it would seem that
homing instinct is deeply nested within archosaurs,
since both birds and crocodiles exhibit this behavior.

Either that, or the reason crocs and birds survived is because they had this ability, while other archosaurs didn't.


There's no reason to suspect that the homing abilities of birds and crocs are due to the same physiological adaptations - especially since it's now been shown that birds can see magnetic fields via adaptations in the eye itself (not something you'd expect in largely nocturnal crocs). Marine turtles also have phenominal homing abilities, yet I wouldn't suggest that they got them from the common ancestor of turtles and archosaurs.

___________________________________________________________________

Dann Pigdon
GIS / Archaeologist              geo cities.com/dannsdinosaurs
Melbourne, Australia             heretichides.soffiles.com
___________________________________________________________________