Wetlands are areas that contain a lot of water but are not ponds or lakes. Vanishing lakes as well as lakes in the process of forming can saturate the land for a time, creating distinct environments: marshes, swamps, and bogs.
Waterlogged land with an inch or two (2 to 4 centimeters) of standing water during flooding or heavy rain is called a marsh. Swamps are marshes that are always covered with water, sometimes a foot or two (30 to 60 centimeters) deep.
Areas of shallow ponds and pools covered with moss and other vegetation are called bogs. Bog water is often too acidic to support common wetland vegetation.
Instead, you can find carnivorous plants, such as Venus’s-flytraps and pitcher plants, growing in bogs. Or you could find less deadly plants, such as cranberries.
Some bog surfaces can support a lot of weight—even that of a person or tree; walking across such a bog, called a “quaking bog,” is like walking on a waterbed.