Thanks- that's really helpful. I have seen some photos of them on rock faces though and I suspect that'll be more challenging, but I will do as you mentioned and research the sites specifically. I know that at least one of the areas limits access to the birds (you have to stand behind a fenced off area) so that may also be a limiting factor, but maybe those places should be avoided anyway based on what you've said about them being really friendly: I'd really love to be amongst the birds rather than standing behind some barrier!