Arboreality and Utility of Climbing: Not the Same Thing

["Jaime A. Headden" <qilongia@yahoo.com>]

Hello list,

  Vertical running does not require a tree. You can use a cliff-face, or a 
simple rock spur,
instead of a tree trunk, and gain the same effect as with a tree. Arboreality 
in this case should
be spearated from the idea of climbing a tree trunk. Arboreality properly 
provides for life-styles
spent within the tree, as in branch-to-branch, etc.. Tree-trunk climbing is 
easily within the
scope of the functional concept of vertical running without ever involving the 
idea of feather
development, as well, as it may have been a driving phase in the development of 
the flight stroke.
Feathers were probably present before the first expression of vertical running. 
However, I am to
understand the paper is in prep, or press, so maybe we shall "wait for the 
paper".


=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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