Somebody recently told me that the Jersey Devil legend had been debunked, so I went and looked it up for myself and found out it's not quite so simple. The article in question is on a website called Skeptoid, which tells you what the author's bias is right off the bat. To his credit, though, he avoids the most common fallacy of professional debunkers- assuming that if you can come up with some vaguely possible non-supernatural explanation of what might have happened, you have effectively disproved the entire legend.