Question: What is the most important reason for birds to have Latin names?
Answer: It's so there can be common communication. Humans have this obsession for giving names to things they like, love or are obsessed with, and they feel their own names are better than what other people call the thing.
Thus, popular and widespread wildlife have many local and/or common names. For example the Lesser Scaup (Aythya affinis), which is hunted extensively, has over 40 common names. That is surely a recipe for confusion. So for each species, there is one uniform, worldwide official name, and that's the Latin name.
