The Dover Demon is an alleged cryptozoological

Cryptozoology

Cryptozoology refers to the search for animals whose existence has not been proven...

 creature sighted on three separate occasions during a 25-hour period in the town of Dover

Dover, Massachusetts

Dover is a town in Norfolk County, Massachusetts, United States. The population was 5,589 at the 2010 census.Located about southwest of downtown Boston, Dover is a residential town nestled on the south banks of the Charles River. Almost all of the residential zoning requires or larger...

, Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

 on April 21 and April 22, 1977. It has remained a subject of interest for cryptozoologists ever since then. Cryptozoologist

Cryptozoology

Cryptozoology refers to the search for animals whose existence has not been proven...

 Loren Coleman

Loren Coleman

Loren Coleman is an author of books on a number of topics, including cryptozoology, who was born in 1947 in Norfolk, Virginia and grew up in Decatur, Illinois.-Education:...

 was the initial investigator and the individual who named the creature the Dover Demon; it was disseminated by the press, and the name stuck. Coleman quickly assembled and brought into the inquiry three other investigators: Joseph Nyman, Ed Fogg, and Walter Webb.