Which was the oldest bird on earth?

Answer 1

Protoavis, which predates Archaeopteryx, is the first link between birds and dinosaurs. Strangely, Archaeopteryx, which came later, does not appear to be related to Protoavis...which only deepens the mystery as to when birds actually "took flight."

Answer 2

archaeopteyrx were the oldest birds.They lived for 160 million years

Answer 3

Cranes