Human: Why is the guinea pig on the flag of Papua New Guinea? Assistant: 
The guinea pig is the national animal of Papua New Guinea. It is believed that the guinea pig was chosen as the national animal because it is a native animal to Papua New Guinea and is very common throughout the country. The flag is a horizontal tricolor with the colors blue, red, and yellow. The blue color represents the Pacific Ocean, the red color represents the highlands, and the yellow color represents the lowlands.