The eastern forests abound in hardwoods, including indigenous varieties such as urunday, cedron, curupay, and lapacho. In the northern Chaco, along the Paraguay River, there are scattered stands of quebracho and many large, spreading trees, such as the ceiba. Medicinal herbs, shrubs, and trees, as well as some dyewoods. Yerba maté, a holly popularly used in tea, grows wild in the northeast. Animals found in Paraguay include the jaguar, especially numerous in the Chaco, wild boar, capybara, deer, armadillo, anteater, fox, brown wolf, carpincho, and tapir. Paraguay has many crocodiles along its watercourses, and the boa constrictor thrives in the west. The carnivorous piranha is also common.