It is also possible that Gen. 1 is describing six literal but not sequential days. The text does not specify that the six creative days were sequential. New life forms emerged suddenly, followed by gradual development. Darwin postulated that the fossil record would show a gradual development of simpler to more complex life forms. This better fits the Genesis 1 record, assuming it is describing an old earth.
Humans are more recent than most other life forms.
Unlike the ancient Near Eastern myths which placed humans before other life forms, the biblical creation account is confirmed by the fossil record, which tells us that humans have appeared very recently in geological time. Having said the above, we must also understand that Gen. 1 is not a scientific textbook . It is unfair to impose upon it standards of specificity and perspective that are appropriate to the scientific discipline. It is highly selective . We do this every day when our news focuses on events that pertain primarily to human affairs.