In the eastern part of the country, commonly known as the Amazon Basin, there is almost constant heavy rainfall and high humidity. The vegetation of the Ecuadorian Amazon is exuberant as is its fauna. Quite a few different bird species, many of which are in danger of extinction, and a great variety of mammals, reptiles, and fish all make their home there. Within and around the huge protected areas of the Amazon Rain Forest several indigenous groups live side by side, each maintaining its distinct customs and traditions. These indigenous peoples live in houses made from native materials and are sought after as jungles guides today. Responsible tourism generates revenues which allow the tribes to maintain their communities and protect the rainforest from encroachment.