Peri-peri, cayenne, and bird's eye are all types of chili peppers. These peppers are known for their spicy and fiery flavor. Peri-peri, also known as African bird's eye chili, is a small and potent chili pepper commonly used in African and Portuguese cuisine. Cayenne pepper, named after the city of Cayenne in French Guiana, is a moderately hot chili pepper often used in various dishes and spice blends. Bird's eye chili, also known as Thai chili, is a small and extremely hot chili pepper commonly used in Southeast Asian cuisines.