First choose a place for a quiz and then choose either mammals, birds, or flowers Small locations may have too few observations and large ones may have too many obscure species. The drop-down menu in the quiz lets you choose a taxonomic order (above family and below class).
"Random order" will choose an order for you, and is a good choice for large areas like states or countries.
"All orders" will make a quiz based on all the species in the area and is a good choice for smaller areas like parks or preserves.
You will need to reload to change order - the whole quiz will remain in the "All Orders" until you load something else.