Brazil's golden lion tamarin (Leontopithecus rosalia), too golden lion marmoset, is one of the most endangered mammals in the world. The golden lion tamarin is a small, squirrel-sized monkey, about 20 - 33 cm long with a 32 - 40 cm long tail, weigh 450 to 800 gr. There is no sexual dimorphism. They have small, rounded heads adorned with a thick golden mane on the crown, cheeks, throat, ears and shoulders. Their bare faces are flat and have widely spaced nostrils. Their bodies are covered in…