A collection of seasonal posts from on or around Halloween:
October 31st, 2014: Rook
October 31st, 2013: Birder At Sea (not Halloween themed, but definitely terrifying!)
November 1st, 2012: Happy, Happy, Happy Halloween!
September 28th, 2012: Nervous Birder (out of season by a month, but also terrifying)
October 31st, 2011: Boo!