Some plants (like trees) have evolved with different unusual nutritional adaptations over time. Heterotrophic plants are plants that use only or partly a source of organic carbon to grow, unlike the most common autotrophic plants, which use inorganic carbon and water to grow, often through the process of photosynthesis (photoautotrophic).
Are you asking what their predators are? As adults, the Australian meat ants can eat them. As tadpoles, they are eaten by camen, catfish, cat-eyed snakes.