Connecticut is the third smallest state by area, the 29th most populous,[ and the fourth most densely populated of the 50 United States. It is known as the "Constitution State", the "Nutmeg State", the "Provisions State", and the "Land of Steady Habits". It was influential in the development of the federal government of the United States. Much of southern and western Connecticut (along with the majority of the state's population) is part of the New York metropolitan area; three of Connecticut's eight counties are statistically included in the New York City combined statistical area, which is widely referred to as the Tri-State area. Connecticut's center of population is in Cheshire, New Haven County, which is also located within the Tri-State area.
Much of the state's lands were formed from sediment washed down the Mississippi River, leaving enormous deltas and vast areas of coastal marsh and swamp. These contain a rich southern biota; typical examples include birds such as ibis and egrets. There are also many species of tree frogs, and fish such as sturgeon and paddlefish. In more elevated areas, fire is a natural process in the landscape, and has produced extensive areas of longleaf pine forest and wet savannas. These support an exceptionally large number of plant species, including many species of orchids and carnivorous plants. Louisiana has more Native American tribes than any other southern state, including four that are federally recognized, ten that are state recognized, and four that have not yet received recognition.