U.S. Fish & Wildlife Service has a great website. Go there to read in depth passages regarding the sale, trade, and transport of animal and plant products. The links to the various treaties are here. Find an office near you. Own a piano with elephant ivory keys? Yep, you need a permit to export it to your villa in Mexico. Want to know what critters and weeds are endangered, this is the page. Antiques and jewelry dealers need to know all of this stuff. Yes, we need to know it all.