"She has an eagle and an owl."

Translation: Ea are un vultur și o bufniță.

[pernifin]

Why is the second article translated as "o" while the first is "un"?

[Caesar_Imperator]

Because „vultur” is masculine and therefore can only take the indefinite article „un” before it. The same logic applies to „bufniță” which is feminine, so it takes an „o” before it.