Complex sentence: The Masked Crimson Tanager, which prefers to inhabit sites closest to or around oxbow lakes, a common geographical feature of their native Amazonia, demonstrate aggression while defending the more productive areas around the lakes, subjecting the Silver-beaked Tanager to occupy the riparian forest.
Split into simpler sentences: The Masked Crimson Tanager prefer to inhabit sites close to or around oxbow lakes, a common geographical feature of their native Amazonia. They demonstrate aggression while defending the more productive areas around the lakes, causing the Silver-beaked Tanager to occupy the riparian forest.