"Flyger devoted himself to studying squirrels because, as he explains it, they weigh less than a deer and don't bite like a polar bear. He used to smear a tree behind his Silver Spring home with a mixture of peanut butter and Valium and then tattoo the squirrels that he found passed out below." [http://www.washingtonpost.com/wp-dyn/content/article/2005/05/18/AR2005051802251_2.html]