Hello, I was wondering how much trivia we would need to know for each order and genus, or if it's even relevant at all.
Okay this may not be good advice because I've never actually competed but I think that you should know things like state reptiles, etymology, information specifically pertaining to your state, but just things that you think are relevant and different from other genera/orders. For example, the fact that a species of Ensatina is a ring species.
Two years ago I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Last year I knew stuff about amphibians, reptiles, freshwater, and more experiments, yay again!
Now I know stuff about oceanography, saltwater, and birds, yay for the third time!