thank you for the excellent clarification, john. i have wondered much the
same thing on occasion...

00 caren
http://realistatlarge.blogspot.com/
george davis creek, north fork


On Wed, Dec 17, 2008 at 14:10, <johntubbs at comcast.net> wrote:

> <lotsa snips>Following is from Merriam-Webster online:
>
> *Migration: ...to pass usually periodically from one region or climate to
> another for feeding or breeding.*
>
> A good general discussion of bird migration can be found in The Handbook of
> Bird Biology (2004, Cornell Lab or Ornithology in conjunction with Princeton
> University Press), pp. 5-51 through 5-99. Or, for the truly dedicated
> (obsessed?), there is always The Migration Ecology of Birds by Ian Newton
> (2008, Academic Press/Elsevier Ltd.) - all 976 pages of it...! All the
> discussion in the Cornell text (which forms the basis of Cornell Lab's home
> study course in bird biology) clearly and consistently refers to migration
> in the context of an overall activity by a species, not individuals.
>
> Regards,
>
> John Tubbs
> Snoqualmie, WA
>