Complex sentence: Despite its harsh desert environment, Big Bend has more than 1200 species of plants (including 60 cactus species), over 600 species of vertebrates, and about 3600 insect species.
Split into simpler sentences: Despite its harsh desert environment, Big Bend has an amazing variety and number of plant and animal species. It has more than 1200 species of plants (including 60 cactus species), more than 600 species of vertebrates, and about 3600 insect species.