A desire to learn as well as to teach, patience, a good disposition, and good people skills. It's very useful to be able to read people as an interpreter. The way you interpret an animal is different for different groups of people. I would deliver the same information, but in different ways depending on who I was talking to. I wouldn't talk about the sexual advantage a large lion mane confers when I was talking to a five year old, unless they specifically asked. It's important to understand that not everyone understands or even wants the same information. Just saying that "the bigger the mane, the stronger the lion" is enough for a kid to understand. But if it's an adult who seems to have an interest, I can talk about honest signals of genetic fitness and other signals in the animal kingdom.