Anous brothers Ross Wood and Stu Mackenzie along with companions Matt Slaymaker and Teresa Montras hit up the Niagara River December 2, 2012. Despite pouring rain throughout the day they managed to observe 10 species of gull including 2 adult Black-headed Gulls, and a Black Vulture – see http://anous.org/avian-oddities-interested-birds-rarities-and-more/ for a picture. Other checklists from the day can be observed here – http://ebird.org/ebird/view/checklist?subID=S12209402 and here http://ebird.org/ebird/view/checklist?subID=S12209458 .