The water level of a marsh usually stays about the same throughout the year. If you were to walk into a swamp, you might drown in quicksand. A man who fell into a bog and died about 2000 years ago was found in the 1950s in an almost perfectly preserved state. There are wetlands in Israel. Sacramento-San Joaquin Delta and San Francisco Bay b. American River and Merced River c.
Wetlands are habitats for several species of animals.
American crocodile c. Most of the snakes that live in swamps are poisonous. During migration, birds like to refuel at wetlands while on their trek to their summer or winter homes. There are more live organisms in a healthy wetland than there are in almost any other kind of habitat. Approximately 66 percent of the commercial fish catch taken along the Atlantic and Gulf Coasts in the US depend on wetlands for survival.