While the explanation of the behaviour sounds plausible, it is making a bit
of a leap of logic. Another equally plausible explanation is terrestrial
predators might be less willing to move out onto slender branches over water
compared to slender branches over land, thus giving a psychological barrier
to predation for the birds. There are possibly other explanations that
would fit the behaviour, and a large amount of observation would probably be
required to find the truth of the matter.
On Fri, Oct 10, 2008 at 10:55 AM, John Leonard <>wrote:
> A friend has just returned from a non-birding trip to the Milne Bay
> area of PNG. She was told by the local guide that the local sp of
> Bird-of-Paradise has a habit of roosting over running water. The
> explanation for this was that if it drops feathers they will be washed
> away and therefore won't guide predators to a favoured roosting site.
> Has anyone heard of this roosting habit for a BoP, and if so, are
> there other explanations than the feathers being washed away one?
> John Leonard
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