The Protobirds are one of the most primitive birds of modern times. Many species of protobirds have evolved from the prehistoric Alexornis, Avisaurus, Longipteryx, Gobipteryx, Sinornis, and Liaoxiornis that survived extinction and remained unchanged. Their favorite food are small flying insects, to fish, to other small animals, depending on different species. There are more than 8,970 species of protobirds worldwide. They live everywhere in North America, South America, Europe, Asia, Africa, and Australia, except Antarctica (where it is too cold for protobirds to live in). Almost all species of protobirds can survive in all human settlements. They also have no fear of humans, unlike crows, sparrows, or other advanced birds.