I don't mean to insult your intelligence, but there is a bit of info on several of them in the Wiki. Have you checked it, or is the data there insufficient for your purposes?
Currently, Sci-Fi network has a show called Sci-Fi Investigates that is investigating a lot of these. Perhaps their website has info for you?
Mothman in particular I think is the inspiration for the 2 Jeepers Creepers movies.
There was a Jersey Devil episode of X-Files.
And there are countless books on Lake monsters (Nessie, Chessie, etc.), furry humanoids (wendigo, sasquatch, bigfoot, etc.), Philly experiment, Roswell, and so forth. Perhaps a book on Cryptozoology would help you out.