23. Tasmanian Devil
The Tasmanian devil, a keystone species in its ecosystem, faces a significant threat from a contagious cancer known as Devil Facial Tumour Disease (DFTD). This disease has drastically reduced their populations, threatening their role as scavengers that help maintain environmental health by consuming carrion. Conservation programs focus on breeding disease-free populations and researching disease management. Preserving the Tasmanian devil is crucial for ensuring the ecological balance and preventing the spread of disease to other wildlife.