Even though plants are the main source of medication, there are some animals that have attributes that are important in producing medications. A cobra venom, for example, has been known to cure leprosy. Lobsters are used often as antifungals.
Watching animals in their natural habitat or zoos is both relaxing and fun. People often go to zoos, oceans, parks, mountain, and forests just to enjoy the fascination of watching how these animals behave.