Halloween. Frequently a wet, cold and dreary day concluding with dubiously decked-out children ‘scarily’ collecting sweets with watchful parents in the shadows (and the odd teenage chancers ditto, but without the parents ). But this year on a warm sunny October 31st I went to have a look at some birds. To start with here are some black-headed gulls (winter plumage) enjoying a serious bathing and preening session at WWT Barnes.