Chauna Torquata is a species of bird that is commonly known as the Southern screamer. It is a large waterbird that is found in South America. The bird is known for its noisy vocalizations that can be heard from a long distance. As far as synonyms for Chauna Torquata go, there are a few different names that are used to refer to this bird. For instance, it is also known as the crested screamer or the chaja. These names are used interchangeably with Southern screamer and point to the same bird. Whatever name you choose to use, though, this fascinating and vocal bird is sure to make an impression.