Chickens have been widely used as national symbols, and as mascots for clubs, businesses, and other associations.
The chicken is a national symbol of France and is used as an (unofficial) national mascot, in particular for sports teams. See also: Gallic rooster.
The Rhodesia (now Zimbabwe) independent party ZANU party used a chicken as a symbol, since a majority of Rhodesian citizens (mostly native African black) were analphabetic due to lack of school funding for the poor, so they use symbol or mascot to identify their political party.
The town of Gallarate in Italy has two roosters in its coat of arms (in Italian, the word "gallo" is used both for "Gallic" and for "rooster"). Other neighboring towns have a similar coat of arms, but without roosters (e.g. Busto Arsizio[1]).