The Curió is very popular cage birds in Brazil. They belong to the finch species Oryzoborus angolensis. They are highly prized for his incredible song and brave.

The word curió is a native South American word meaning man's friend, as the Curio likes to inhabit forest clearing near native people's villages.The Curio measures approximately 5.2 inches in length. The male is black on the back, head and neck with a dark chestnut color over the breast. The Bicudo measures approximately 6.4 inches in length. The male is black. They also have a white spot on the tip of both wings. The hens and youngsters are uniformly brown. They will acquire his adult plumage coloring by 12 to 18 months. They usually achieve sexual maturity and are able to breed by 8-12 months of age.

The Curio was on the extinction list few years ago in Brazil. The high interest for the breeding has helped in the following aspects:

- Preservation of the species (wild birds).
- Better genetic: Easy to breed, birds with major learning possibilities for the song and fiber and, consequently, less exploration of the wild birds.

The song

128 kinds of different songs of Curió were found in Brazil.  The songs of Curió and Bicudo that are more known and preferred are the followings: