A wild sheep with a brown or buff coat, short ears, and large curving horns. The bighorn sheep are can be spotted on rocky hilltops in the park, which they easily climb with their sharp cloven hooves. They feed on small plants, flowers, and cactus. Tarantula - This largest desert spider is not poisonous to humans but bites painfully if provoked. A tarantula may inhabit a burrow for years.
Tortoises can draw their heads and feet completely in under their shells when attacked.
They are generally slow-moving, and live in burrows. Tortoises will eat almost any kind of plant and animal matter, and even though they are toothless, they have no trouble biting off pieces of food with their sharp cutting beaks. Tortoises may live up to 30 or 50 years. Desert Plants Plants which live in the desert survive only if their adaptations allow them either to escape from the worst of the heat and drought or to successfully endure it. Annual plants survive through escape-as seeds that lie dormant in the soil for years until that unpredictable time when a perfect balance of rain and warm temperatures triggers their growth.