There are many different endemic species on the island of Puerto Rico. There are many different species of frogs, birds, snakes, and even some mammals. The reason for this is a process called endemism. Endemism is the ecological state of a species unique to a certain part of the Earth, such as an island. An endemic species is different from an indigenous one because endemic species cannot be found anywhere else. Because an island is so isolated from the mainland, endemic species can grow and evolve more than mainland family members, thanks to there being fewer predators. The Puerto Rican parrot is one of the endemic species of Puerto Rico, hence the name. The parrot is about eleven inches tall and weighs about 9 ounces. It is a predominantly green bird, with a red forehead and white rings around the eyes. Their iris is brown and their legs are light yellow-brown. Both males and females have a predominantly green color, the primary remiges are dark blue. The feathers that are only seen during flight are bright blue, and the tail feathers are yellow...