What is the typical number of species in an exhibit? How can I incorporate reptiles, fish, amphibians, birds, inverts, etc. while making the exhibit still interesting (to the public, all visitors) and plausible for the United States? Are there any major amphibians, fish, inverts, lesser known birds and reptiles, etc. that are found in the central Outback and east billabongs of Australia? If so, what would be a unique way to include them (ie. Rockwork?) so that an average visitor wouldn’t ignore them?