During Springwatch's visit to Blakeney Point they also spotted the sandwich tern - a migrant that nests on the spit during the summer before heading to Africa in the winter.

BBC: Springwatch 2010: Seals on Blakeney Point in Norfolk

But in a paper circulated this summer, the government said it feared the meeting would focus too much on migrant's rights and the obligations of countries who receive them, without looking at the responsibility of the countries they're coming from.

NPR: U.N. Puts Spotlight on Global Immigration