All life on Earth is interconnected to form a balanced, healthy ecosystem, and all species are dependent on each other in some way or another. Biodiversity is essential to a healthy planet, yet many species face extinction. Let's explore some of the causes and effects of endangered animal species.abitat Loss. Habitat destruction is another major threat that causes animals to become endangered. Habitat loss can occur as a result of human activities, such as deforestation, mining, development, or human encroachment, or it may occur as a result of natural events, such as wildfires or other natural disasters.