Thanks for all the responses. To clarify, I was not in any way
suggesting that what I was seeing is unusual. Pizzey’s book mentions it. Most
responses are from coastal SE Australia, so I am still not sure how widespread
the habit is. I think that the strangest one is that Sandra mentioned them roosting
high in dead trees at the Mugga Lane tip. I go there often (both the tip
and along Long Gully road). Maybe I’m guilty of watching the road whilst driving, (lots
of kangaroos there). That is even stranger than at coastal venues. I was
more angling at obtaining hints on the context for why these birds should do
that. It is not as though they are Sea-Eagles looking for an opportunity to swoop
down on a fish. It is not that they are getting away from other pelicans, as they
even have 3 pelicans perched on 3 lights on one pole. They clearly like to do
this and it has some benefit, as it is a high energy behaviour. I notice most
of the venues reported are beachside communities with lots of passing, walking,
running, etc humans. For now the best explanation I can offer is maybe the reason
is as simple as when perched up there, they are immune from being bothered and
having to walk, fly or swim away from passing people, dogs, or whatever. And they
can stay there unbothered until they decide to come down. That will be my
theory for now. When on the ground they sure do “appear” to act indignant at
having to get out of the way. I wonder can there be any other benefit?
Philip
