Loss of habitat is the single greatest threat to any species. If an island on which an endemic organism lives becomes uninhabitable for some reason, the species will become extinct. Any type of habitat surrounded by a different habitat is in a similar situation to an island.
Waltham, MA. Waltham is a city in Middlesex County, Massachusetts, United States, was an early center for the labor movement, and major contributor to the American Industrial Revolution.
Waltham Township is located in LaSalle County, Illinois. As of the 2010 census, its population was 446 and it contained 200 housing units. Geography. According to the 2010 census, the township has a total area of 37.01 square miles (95.9 km2), all land.