Idiots' guide to British Gulls

A while back I came across a post somewhere that highlighted the most important i/d features of the adult gulls you might be most likely to come across in the UK (ie: no Sab's, Ross's or Ivory!)

I thought I'd have a go at doing my own version: no juveniles or immatures, however - that would take another five screen pages! Anyhow: just a bit of fun!