On Thu, 10 Aug 2000, scouler wrote:
> <p>In his email to birding aus on 5 August 2000, Alan Morris referred
> to the sighting of an adult male Northern Pintail in breeding plumage near
> Perth in July, 1985 and said, quoting HANZAB, that it was considered to
> be a case of "accidental reverse migration". Can anyone tell me what "reverse
> migration" is?
The theory is that some bird's navigation is faulty in such a way that
they fly in the opposite direction to that of their target e.g instead of
flying north, they fly south.
Alerstam book "Bird Migration" is a nice ref on migration. He's doubtful
that "reverse migration" exists as a particular phenomen, rather he
posits a continuous spectrum of faults in bird's navigation.
Andrew Taylor
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