I agree with Bob Lewis that it's worthwhile thinking about (and discussing)
the origins of any major rarity, if only to learn more about the movements
and range of the species. Discussions should include the question of
'precedence', meaning a pattern of occurrence beyond the normal range. This
oft
This past Sunday I posted some material on the normal range of Gray-hooded
Gull in South America. I pointed out that the range map in Howell and Dunn
Gulls of the Americas (2007), which some were relying on was in fact
wrong. I reported that I had seen flocks of the species on the north coast
o
Hi..Bob is, I am sure, not the only person to ask similar questions. First,
this species is already on the accepted ABA list, this is not the first
North American record. As far as being a ship-assisted vagrant here is the
link to the ABA rule.(John Pushcock was kind enough to provide the
following
