This may be an error of translation....

And it really depends on the narrowness of one's definition
of migration.

Post-breeding dispersals of eagles can put Alaskan individuals
in California. This based on banded individuals. There are
certainly more eagles (especially sub-adults) on the lower
Columbia River in Feb-Jan than other times of the year. Do post-
breeding movements, which may or may not be directional, which
may or may not include a return flight to where they came from
count as migration?

There are all sorts of faunal movements that one person might
define as migration and another might choose to call something
else...


Sharron Huffman wrote:
>
> I have the subtitled French DVD of Winged Migration. An error that I
> noticed was the assertion that BALD EAGLES migrate the length of the US
> West Coast to and from Alaska. At least I've always assumed we have
> different populations.
>
> Since I know next to nothing about European birds, I can't speak to the
> truthfulness of most of the movie, but I was disturbed when I watched
> part of the long version of the "Making of ..." segment (in French so
> I could only watch), and saw that they raised chicks (geese and cranes,
> maybe others, I haven't watched the whole thing) and imprinted them to
> have their ultralites welcomed in the flocks at migration time.
>
> Sharron
>
> Sharron Huffman
> HERRING COVE ORIGINALS STUDIO & GALLERY
> Ketchikan, AK 99901
> http://www.sharronhuffman.com

--
Mike Patterson
Astoria, OR
celata at pacifier.com

A child who becomes acquainted with the birds about him
hears every sound and puzzles out its meaning with a cleverness
that amazes those with ears who hear not.

-Neltje Blanchan

http://www.pacifier.com/~mpatters/bird/bird.html