Chilean pintail Chilean pintail The Chilean pintail ("Anas georgica spinicauda"), also known as the golden peck duck or brown pintail, is a subspecies of the yellow-billed pintail ("Anas georgica"), a duck in the dabbling duck subfamily Anatinae. Its local names are "pato jergón grande", "pato maicero" and "pato piquidorado" in Spanish, and "marreca-parda" or "marreca-danada" in Portuguese. The Chilean pintail is one of three subspecies of the yellow-billed pintail, and by far the most numerous and widespread. It is found throughout much of South America from extreme southern Colombia southwards to Tierra del Fuego, as well as in the Falkland Islands. The
South China (continent) years ago, Rodinia rifted and South China became an isolated continent. A hundred million years later, these fragmented pieces of continent assembled back together to create the supercontinent of Pannotia. South China collided with North China and Eastern Gondwana (mainly Australia). When Pannotia disintegrated 550 million years ago, South China (and North China) became part of and remained with Eastern Gondwana for millions of years. Late in the Silurian (175 million years later after Pannotia's disintegration), South China (and North China), rifted away from Gondwana and moved across the ancient, shrinking Proto-Tethys Ocean. A new ocean was forming , Paleo-Tethys