Warblers-Marmite birds? I am always working on my website, my current project is to illustrate every bird on Category A of the British List. I am quite a long way in, and have come to "old world" warblers. Like gulls, warblers, particularly Phyllosopus, seem to either provide great interest and a challenge, or are something to be ticked and then forgotten. I used to be somewhat in the latter group, but researching for my website has thrown up many interesting facts about vagrants to Britain. Many firsts for Britain in the 21st century have been warblers, including Eastern Crowned, Pale Legged Leaf and Olive-tree. Several have been as a result of splits, and older records were rarely assigned to the relevant subspecies. This is rarely important since few records exist, and they can be re-examined, however in the case of Subalpine Warblers it really isn't possible. Adult male birds aren't too bad, but females and immatures can be impossible to assign to one...