This video from Brazil is about the three-banded armadillo as soccer World Cup 2014 symbol.
From the Caatinga Association, conservationists in Brazil:
After 64 years, Brazil returns to stage the biggest sporting spectacle on the planet: World Cup Soccer and any [animal] that is chosen for the event should show the “face” of Brazil and the “face” of our football.
The Caatinga Association, an institution that advocates the development and protection of our biodiversity, [has] proposed as an animal mascot [a] very special and unique [species] that only exists here in Brazil: the three-banded armadillo (Tolypeutes tricinctus), [with] the ability to bend upon itself to protect themselves when threatened, leaving the shape of a ball.
[It is] nocturnal, feeds on ants, termites, spiders and berries. It is the most endangered armadillo from Brazil and has already [become extinct in] many states. [It shows] peculiar behavior, which could brighten the cup, showing the world our rich nature and our commitment to biodiversity as well as sensitiz[ing] the people of Brazil for the defense and protection of our nature. This graceful animal is the main protagonist in the name of football: the ball.
See also here.