The most plentiful bird in the world is the Red-billed Quelea of Africa.

The world's most common or numerous bird is Africa's red -billed Quelea.

Q. quelea, or Red billed quelea are one species of the African weaverbird. Traveling in huge flocks, in years when rainfall is good and cereal crops do well, they are voracious crop pests, descending on fields in flocks of millions, the birds decimate entire crops.

The red billed quelea is a small bird in the weaver family. They live in southern Africa in huge flocks over a thousand strong.

The least dangerous animal in the world is a well probably a house fly.