Complex sentence: Like may birds in the area, its condition as a species began to deteriorate as new plants replaced those that it was familiar with many of these plants included raspberries which literally choked out the native growth and made its self an invincible plant.
Split into simpler sentences: Like may birds in the area, its condition as a species began to deteriorate as new plants replaced those that it was familiar with. Many of these plants included raspberries which literally choked out the native growth and made itself an invincible plant.