Ever wonder why rice is not endangered?

There's a demand for it, and secure property rights for producers.

Worried about recycling paper in order to save trees? Don't be. Producers have an incentive to plant more trees in order to serve the demand for wood pulp that goes into making paper.

Let's apply that idea to endangered plants and animals. Someone has. Read it in the New York Times "An Unlikely Way to Save a Species: Serve It for Dinner":

[Gary Paul Nabhan] has spent most of the past four years compiling a list of endangered plants and animals that were once fairly commonplace in American kitchens but are now threatened, endangered or essentially extinct in the marketplace. He has set out to save them, which often involves urging people to eat them.