Nicaragua is full of animals of all kinds. The rainforests, lakes, mountains and volcanoes of Nicaragua are home to a large variety of animals, birds, and sea life. Lake Nicaragua and the River San Juan are home to the only known fresh water sharks in the world. They are bull sharks that came from the Caribbean up the River San Juan and slowly adjusted to the freshwater. On the Pacific coast, a refuge has been set aside for the thousands of sea turtles that come out of the ocean at night to lay there eggs on the sandy beaches. The guardabarranco is the national bird of Nicaragua. It is red and yellow with green tail feathers. It eats bugs, small lizards, and fruit. Green parrots, known as chocoyos live within the crater of Masaya volcano, nesting on rocky ledges, surrounded by sulfur dioxide gas. Other colorful birds in Nicaragua are macaws, parrots, and toucans. It is common to see people selling parrots on the roadside, or having them as pets in their homes. The jaguar is the largest wild cat that lives in Nicaragua. Some others are the puma, cougar, jaguarondi, margay, and ocelot