While putting together this week's quiz I decided to create a category just for the quizzes on the blog page and, in doing so, discovered that the sequence of quizzes contained a duplication - there were 2 #5's. So no, you haven't missed one - last week's quiz was really #11 and the answer was Black-legged Kittiwake. And, since a few of you deemed it to easy, here is one that you may have to work at a little. Another confusing "non-adult" plumaged gull (after this one we'll leave the gulls alone for a while). Good luck!