[Junior]

To the ancients, creatures such as a bat were considered birds since they categorized all flying animals as birds.

Indeed. These are the kinds of errors you would expect from cultures of that time -- but not from God.

[jude24]

Indeed. These are the kinds of errors you would expect from cultures of that time -- but not from God.

Taxononmy is classification. It by definition cannot be error because it is subjective. While one could say that our system is much more precise than the ancients, one must never confuse accuracy and precision, especially in situations where, as here, the issue is one of inherent definitions.