Most of us think of islands as patches of land surrounded by water. But in northeastern Brazil, you can find something akin to islands in the Caatinga Enclaves Moist Forests. These patches of moist forest are surrounded by a "sea" of arid scrub forest and savanna. Called brejos by local people, the forests are found mostly in four major island formations, known as enclaves. So distinct are these enclaves that some species of plants, amphibians, and birds live only in one of the patches and nowhere else on Earth!
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